Puccinia Black & White Stock Photos
RMP5EGHM–N/A. eština: Rez travní na dišálu, ilustrace A. J. Bernarda z roku 1901. Originální popis: „Píný ez listem dišálovým; nahoe jsou dv spermogonie, pak buky naplnné chlorofyllem; dole aecidie s vlákny houbovými, která odškrcují výtrusy.“ . 26 January 2014, 15:43:36. Alexander Josef Bernard, 1859–1912 190 Berberis vulgaris et Puccinia graminis, Bernard
RFT602R7–An image of Stem Rust, It also known as puccinia graminis. The stem, black and cereal rusts are caused by the fungus puccinia graminis, vintage line d
RM2AJ7G88–Soils and crops of the farm . s caused by, or rather is, the general term forseveral species of fungi, the best known of which iscalled by botanists Puccinia graminis. The life his-tory of this fungus is supposed to be about as follows:Certain forms of the plant grow in the leaves of thebarbary plants and perhaps other plants. On theleaves of the barbary plant there appears in the springcertain orange-colored spots. These spots are com-posed of many spores which, getting upon the leavesof the wheat, in some way not well understood, enterthrough the breathing pores. The spores producemicroscopi
RMPG3NNX–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 403 X. ASPARAGUS RUST Puccinia Asparagi De C. Halsted, B. D. The Asparagus Rust; Its Treatment and Natural Enemies. N. J. Agl. Exp. Sta. Built. 129: 1-20. pi. 1-2. 1898. Halsted, B. D. Experiments with Asparagus Rust. N. J. Agl. Exp. Sta. Rept. 11: 343-347. 1898. Sirrine, F. A. Spraying for Asparagus Rust. N. Y. Agl. Exp. Sta. Built. 188: 122-166. 1900. Smith, Ralph E. The Water-Relation of Puccinia Asparagi. Bot. Gaz. 38: 19-43- fig*- 1-21- I9°4- Smith, Ralph E
RMRDJ5XX–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 403 X. ASPARAGUS RUST Puccinia Asparagi De C. Halsted, B. D. The Asparagus Rust; Its Treatment and Natural Enemies. N. J. Agl. Exp. Sta. Built. 129: 1-20. pi. 1-2. 1898. Halsted, B. D. Experiments with Asparagus Rust. N. J. Agl. Exp. Sta. Rept. 11: 343-347. 1898. Sirrine, F. A. Spraying for Asparagus Rust. N. Y. Agl. Exp. Sta. Built. 188: 122-166. 1900. Smith, Ralph E. The Water-Relation of Puccinia Asparagi. Bot. Gaz. 38: 19-43- fig*- 1-21- I9°4- Smith, Ralph E
![. Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie Stock Photo](https://c8.alamy.com/comp/PG029M/photomicrographs-of-botanical-studies-photomicrography-pliofoiiiicrofirapis-of-botanical-studies-13-5penicillium-glaucum-mycelium-of-fungus-conidiophores-fruiting-bodies-6-ts-leaf-of-thistle-puccinia-graminis-carduusquot-attacked-by-uredospores-of-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-flatters-milborne-amp-mckechnie-ltd-manchester-flaters-milborne-amp-mckechnie-PG029M.jpg ". Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie Stock Photo")
RMPG029M–. Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie
RMRE1NCW–. A text-book of elementary botany. Botany. SYSTEMATIC BOTANY. 97. Fm. 123. Uromyces and Melampsora), two-celled (as in Puccinia. or Rusts, Fig. 123, and Gymnosporangium, the so-called Cedar apples,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Kellerman, William Ashbrook, 1850-1908. Philadelphia, Eldredge & Brother
![. Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil Stock Photo](https://c8.alamy.com/comp/PG029H/photomicrographs-of-botanical-studies-photomicrography-mycelium-of-fungus-conidiophores-fruiting-bodies-6-ts-leaf-of-thistle-puccinia-graminis-carduusquot-attacked-by-uredospores-of-uredospores-mycelium-of-fungus-disorganised-tissue-of-leaf-disorganized-palisade-layer-f-upper-cuticle-of-leaf-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-flatters-milborne-amp-mckechnie-ltd-manchester-flaters-mil-PG029H.jpg ". Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil Stock Photo")
RMPG029H–. Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil
RMRDHRWY–. Fungi; their nature and uses. Fungi. GERMINATION AND GROWTH. 145 production of cylindrical tubes, which start from the upper extremity of the wedge-shaped spores, or more rarely from the base. These tubes are straight or twisted, simple or bifurcated, and each of them very soon emits four monosporous spicules, at the same time that they become septate. The sporules are in this instance globose. In Uromyees germination follows precisely the same type as that of the upper cell of Puccinia; in fact, Tulasne states that it is very difficult to say in what they differ from the Puccinia which are
RMPG4420–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER III.—SPORES OF FUNGI. lOI Others perform no such function and are therefore only simple pores or pits. The position of the pores on the membrane is different in different species. The spores, for instance, of Sordaria fimiseda, de Not. have at their apex a germ-pore which is closed only by the outermost lamella of the membrane (Fig. 52). The germ-pores of the uredospores which I have examined, those of Puccinia for example and Uromyces, are sharply defined rou
RMRE3CX5–. A handbook of cryptogamic botany. Cryptogams. .Fig. 274,—Puccinia graminis Pers. t, teleutospores ;«, uredo- spores(x 390). (After Sachs.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
RMPG4EFX–. Diseases of economic plants . Plant diseases. CEREALS 341 plants, and it has been proved experimentally that such seed carries the disease to the offspring.^ As a preventive meas- ure resistant varieties should be selected for planting, and all seed from plants which are at all diseased should be avoided. The disease may be carried from one locaUty to another by any of the means sug- gested under soil dis- eases, and especially by manure infected with stalks of diseased plants. Rust {Puccinia Sorghi Schw.). — Corn rust seems to have taken its place in hterature in 1815. It is of compara- tiv
RMRDXGTE–. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. developed on Berberis vulgaris, but no corresponding uredo- spores or teleutospores upon that plant, and therefore they have to be sought elsewhere (Fig. 117). On the other hand, the uredospores and teleutospores of Puccinia graminis nourish on wheat and other grasses, whilst no spermogonia or aecidia have been known to infest the latter plants. Hence it is con- cluded that the above form the normal series, with the spermogonia and aecidia on the berberry, and the uredo
RMPG4ANR–. Botany for agricultural students . Botany. SUMMARY OF BAKIDIOMYCETES 403 Asparagus Rust. — Asparagus is often attacked by a Rust (Puccinia Asparagi) which is a type of those having but one host. The uredospores, teleutospores, and aecidiospores all occur on the Asparagus. Some other forms of Rusts of some importance occur on Clover, Alfalfa, Beans, Peas, Beets, Timothy, Corn, Peach trees, etc. Summary of Basidiomycetes. — Like the Ascomycetes the Basidiomycetes are parasites or saprophytes on land plants and have no motile spores. The Basidiomycetes are supposed to sporidia. aecidiospores Fi
RMRDXGTH–. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 246 INTRODUCTION TO THE STUDY OF FUNGI. developed on Berberis vulgaris, but no corresponding uredo- spores or teleutospores upon that plant, and therefore they have to be sought elsewhere (Fig. 117). On the other hand, the uredospores and teleutospores of Puccinia graminis nourish on wheat and other grasses, whilst no spermogonia or aecidia have been known to infest the latter plants. Hence it is con- cluded that the above form the normal series, with the spermogonia an
RMPG4B3X–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 360 UREDINEAE. This rust is indigenous to Chili, and was introduced into France about 1868, whence it rapidly extended throughout the whole of Europe, and during the last ten years has made its appear- ance in the United States. In many places it has completely exterminated both wild and cultivated mallows, and rendered the cultivation of garden hollyhocks impossible. It appears in. Fio. 192.—Puccinia matvaceai'um.
RMRE377N–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 246 PUCCINIA hetercecioiis and autcecioiis species respectively, though this is certainly not always true. The only British species of Carex which have been proved by cultures to be connected with this EBcidium are C. caryophyllea (praeoox) and 0. arenaria, but it is supposed to grow also on a large number of other species. The matter is, however, complicated by the fact that there are two other Pucciniae (P. arenariicola and P. Schoeleriana) which are very closely allied and differ chiefly in having their seci
RMPG3NN9–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 409 Probably the most important species of the rust family, both from an economic point of view and also from the point of view of the development of mycological research, is the common species, Puccinia graminis, upon cereals. It was upon this species that the classical researches of De Bary (1865 et seq.) were based, throwing light upon many phenomena of parasitism. In more recent times this species has served further as a means of developing a knowledge of bi
RMRE38D2–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 14 GERMINATION OF TELEUTOSPOEES Germination of the Teleutospore. We now approach the consideration of a process which has been in the past much discussed, and upon the right inter- pretation of which the whole question of the systematic position of the Uredinales depends. Each cell of the teleutospore of P. Caricis has one germ-pore, though some genera alhed to Puccinia have teleutospores with more than one germ-pore to each cell, e.g. Phragmidium, JJropyods, Calliospora. The germ- pore of the upper cell is in
RMPG4B5N–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PUCCINIA. 343 hyphae forming the bottom of the aecidium-cup. These hyphae give rise to numerous short sporophores, from each of which a single long chain of spores is abjointed in basipetal succession, the spores being at first separated by temporary intermediate cells. The sporophores round the margin of each aecidium do not, however, give off spores; they also produce chains of cells basipetally, but these grow la
![. Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie Stock Photo](https://c8.alamy.com/comp/RDDC29/photomicrographs-of-botanical-studies-photomicrography-pliofoiiiicrofirapis-of-botanical-studies-13-5penicillium-glaucum-mycelium-of-fungus-conidiophores-fruiting-bodies-6-ts-leaf-of-thistle-puccinia-graminis-carduusquot-attacked-by-uredospores-of-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-flatters-milborne-amp-mckechnie-ltd-manchester-flaters-milborne-amp-mckechnie-RDDC29.jpg ". Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie Stock Photo")
RMRDDC29–. Photomicrographs of botanical studies. Photomicrography. Pliofoiiiicrofirap/is of Botanical Studies. 13 5.—Penicillium glaucum.. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Milborne & McKechnie
RMPG4B54–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 352 UREDINEAE. aecidia (Aec. parnassiae Schlecht.) on Parnassia palustris.. Spermogonial pycnidia are unknown. P. sdrpi D. C. (Britain). Uredo- and teleutospores on Scirpus; aecidia, according to Chodat, = Aec. nymphaeoides on Nymphaea, Nuphar, and Lim- nanthemmn, nymphaeoides.. Fig. 186.—Puccinia suaveolens on Cirsium arveTise. The plants ai-e abnormally slongated; the leaves have remained smaller and simpler, and
RMRDX0HK–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 208 PROTOBASIDIOMYCETES [CH. the usual way. In the micro- form Puccinia transformans OHve observed that the binucleate condition was brought about by the fusion in pairs of cells to form the basal cells from which the teleutospores arose and the same has been reported by Moreau for Puccinia Buxi and Uromyces Ficariae. In Puccinia Malvacearuni Moreau occasionally found a difference in size between the fusing cells, and Werth and Ludwig observed the migration of the nucleus of the smaller cell into the larger (fig. i84«). Below the teleutos
RMPG4ARF–. Botany for agricultural students . Botany. BLACK RUST OF GRAIN (PUCCINIA GRAMINIS) 397. Rye, and Barley, and occurs on other Grasses. The presence of the mycelium in the host is first known through the appearance of reddish spots or lines on the stems and leaves in late spring or early sum- mer. The reddish spots or lines are regions of spore production. They are pustules or blister- like structures caused by masses of spore-bearing hyphae which push up the epidermis until it is finally ruptured (Fig. 353). The reddish color of the pustules is due to the reddish color of the spores. These sp
RMRDHRW7–. Fungi; their nature and uses. Fungi. Fig. 85.—Germinating pseudospore of Puccinia Molinice. (Tulasne.) pears. The form of the latter is at first globular, then ellipsoid, and more or less curved. All these phases of vegetation are accomplished in less than twelve hours, and if the spore is mature and ready for germina- tion, it is sufficient to provoke it by keeping the pseudospores in a humid atmosphere. During this process the two cells do not sepa- rate, nor does one commence ger- mination before the other, but both simultaneously. When the sporules are produced, the proto- spore, somewha
RMPG4AR3–. Botany for agricultural students . Botany. BLACK RUST OF GRAIN (PUCCINIA GRAMINIS) 399. Fig. 356. — Stage of the Wheat Rust on the Barberry bush, BcrherU vulgaris. Left, leaf of Barberry, showing the affected areas which are red- dish, much thickened, and contain many cup-like depressions; right, a very much enlarged section through the affected area of the leaf, showing one of the cups (c) with chains of aecidiospores (X 200). The very small spores at (p) are the spermatia or pycniospores.. Please note that these images are extracted from scanned page images that may have been digitally enh
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. STERILE CELLS 19 Christman, occurring side by side. All the conjugating cells had an upper sterile cell which he calls a " buffer" cell; but the passage of the nucleus only he put down, as others have done, as a pathological phenomenon, caused perhaps by the method of fixing. In November of the same year Dittschlag, investigating Puccinia Falcuriae, tried to settle the question and decide definitely the function of the spermatia. This Puccinia is an -opsis form, having spermogones and secidia, followe Stock Photo](https://c8.alamy.com/comp/RE38CK/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-sterile-cells-19-christman-occurring-side-by-side-all-the-conjugating-cells-had-an-upper-sterile-cell-which-he-calls-a-quot-bufferquot-cell-but-the-passage-of-the-nucleus-only-he-put-down-as-others-have-done-as-a-pathological-phenomenon-caused-perhaps-by-the-method-of-fixing-in-november-of-the-same-year-dittschlag-investigating-puccinia-falcuriae-tried-to-settle-the-question-and-decide-definitely-the-function-of-the-spermatia-this-puccinia-is-an-opsis-form-having-spermogones-and-secidia-followe-RE38CK.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. STERILE CELLS 19 Christman, occurring side by side. All the conjugating cells had an upper sterile cell which he calls a " buffer" cell; but the passage of the nucleus only he put down, as others have done, as a pathological phenomenon, caused perhaps by the method of fixing. In November of the same year Dittschlag, investigating Puccinia Falcuriae, tried to settle the question and decide definitely the function of the spermatia. This Puccinia is an -opsis form, having spermogones and secidia, followe Stock Photo")
RMRE38CK–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. STERILE CELLS 19 Christman, occurring side by side. All the conjugating cells had an upper sterile cell which he calls a " buffer" cell; but the passage of the nucleus only he put down, as others have done, as a pathological phenomenon, caused perhaps by the method of fixing. In November of the same year Dittschlag, investigating Puccinia Falcuriae, tried to settle the question and decide definitely the function of the spermatia. This Puccinia is an -opsis form, having spermogones and secidia, followe
RMPG41EN–. Foundations of botany. Botany; Botany. 262 FOUNDATIONS OF BOTANY prepared cross-sections through the sorus are available, especially il the material is fresh. Examine the spores and note the sha,pe, color, and surface. If the spores are shrunken, a drop of potash solution will restore the natural plumpi),ess. Draw. Spore-measurements are important in determining species. The uredospores of Puccinia graminis may be distinguished from those of other species common ^ on grasses by the greater proportionate length. The structure of the black spores (teleutospores) can be made out with- out diffi
RMRDE2YN–. Diseases of economic plants . Plant diseases. CEREALS 341 plants, and it has been proved experimentally that such seed carries the disease to the offspring.^ As a preventive meas- ure resistant varieties should be selected for planting, and all seed from plants which are at all diseased should be avoided. The disease may be carried from one locaUty to another by any of the means sug- gested under soil dis- eases, and especially by manure infected with stalks of diseased plants. Rust {Puccinia Sorghi Schw.). — Corn rust seems to have taken its place in hterature in 1815. It is of compara- tiv
RMPG3NN3–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 411 first as small, flask-shaped bodies, shown in Fig. 202, breaking through the upper epidermis of the leaf. Somewhat later, and in the same spot, there appear on the under surface the aecidial. Fig. 202. Puccinia graminis. (After Ward) , section of barberry leaf showing spermogonia and ascidia; b, secidium stage, which breaks through the epidermis in somewhat similar manner. The spermogonium shows a very simple development, resulting by the gradual growth in e
RMRDD7NW–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 360 UREDINEAE. This rust is indigenous to Chili, and was introduced into France about 1868, whence it rapidly extended throughout the whole of Europe, and during the last ten years has made its appear- ance in the United States. In many places it has completely exterminated both wild and cultivated mallows, and rendered the cultivation of garden hollyhocks impossible. It appears in. Fio. 192.—Puccinia matvaceai'um.
RMPG3NNA–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 408 FUNGOUS DISEASES OF PLANTS is one of the most common, yet it may not be considered of any special economic importance. The aecidiospores are almost twice as long as broad, 40 X 17-26 p. The uredospores are subspherical, and the teleutospores are conspicuous by their long, hyaline, and relatively thick pedicels, papillate apex, red-brown color, and verru- cose outer wall.. Fig. 200. jEcidial Stage of the Grain Rust on Barberry XIII. BLACK RUST OF GRAIN Puccinia graminis Pers. Bo
RMRDHRP8–. Fungi; their nature and uses. Fungi. Fig. 107.—Cells and pseudospores of JEcidium berberidis. Montagne has, however, described a Puccinia berberidis on leaves of Berberis glauca from Chili, which grows in company. Fig. 108.—Cells and pseudospores of Xeidium graveolens. with Mcidium, berberidis. This at first sight seems to contradict the above conclusions; but the Mcidium which from the same disc produces the puccinoid resting spores, appears to be dif- ferent from the European species, inasmuch as the cells of the wall of the sporangium are twice as large, and the spores de- cidedly of grea
RMPG4B5H–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 344 UREDINEAE. through the epidermis. The yellow uredospores are abjointed singly from long sporophores; they are unicellular and ovoid, with a thin granular coat beset with germ-pores (Fig. 184). The uredo- spores are easily conveyed to other grass-plants and germinate at once, their germ-tubes entering by a stoma and developing into a mycelium, which can produce a new crop of uredospores in a. Fig. 184.—Puccinia p
![. Florists' review [microform]. Floriculture. NAPDEAGONS have be- come so generally known that there is no question about their usefulness or their popularity. Demand in every section exceeds the supply, and growers find them a profitable crop. Aside from the usual pests which trouble green- house plants, snapdragons are of such tender character as to invite many fun- gous diseases, some of which are trouble- some and cause loss if not carefully handled. Possibly, the greatest enemy to snapdragon is rust, Puccinia antir- rhini, a disease not yet conquered. Pre- ventive measures are the best we Stock Photo](https://c8.alamy.com/comp/RRCR36/florists-review-microform-floriculture-napdeagons-have-be-come-so-generally-known-that-there-is-no-question-about-their-usefulness-or-their-popularity-demand-in-every-section-exceeds-the-supply-and-growers-find-them-a-profitable-crop-aside-from-the-usual-pests-which-trouble-green-house-plants-snapdragons-are-of-such-tender-character-as-to-invite-many-fun-gous-diseases-some-of-which-are-trouble-some-and-cause-loss-if-not-carefully-handled-possibly-the-greatest-enemy-to-snapdragon-is-rust-puccinia-antir-rhini-a-disease-not-yet-conquered-pre-ventive-measures-are-the-best-we-RRCR36.jpg ". Florists' review [microform]. Floriculture. NAPDEAGONS have be- come so generally known that there is no question about their usefulness or their popularity. Demand in every section exceeds the supply, and growers find them a profitable crop. Aside from the usual pests which trouble green- house plants, snapdragons are of such tender character as to invite many fun- gous diseases, some of which are trouble- some and cause loss if not carefully handled. Possibly, the greatest enemy to snapdragon is rust, Puccinia antir- rhini, a disease not yet conquered. Pre- ventive measures are the best we Stock Photo")
RMRRCR36–. Florists' review [microform]. Floriculture. NAPDEAGONS have be- come so generally known that there is no question about their usefulness or their popularity. Demand in every section exceeds the supply, and growers find them a profitable crop. Aside from the usual pests which trouble green- house plants, snapdragons are of such tender character as to invite many fun- gous diseases, some of which are trouble- some and cause loss if not carefully handled. Possibly, the greatest enemy to snapdragon is rust, Puccinia antir- rhini, a disease not yet conquered. Pre- ventive measures are the best we
RMPG3NMD–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 419 XVIII. HOLLYHOCK RUST Pncrinia malvacearum Mont. Dudley, W. R. The Hollyhock Rust. Cornell Agl. Exp. Sta. Built. 25: 154-155. 1890.. Fig. 204. Puccinia malvacearum: Rust of Hollyhock. (Photograph by H. H. Whetzel) The hollyhock rust is known to infest a large number of genera and species of the mallow family (Malvaceae). It is at present widely distributed throughout a large portion of the world, and is in the United States most important on the cultivated h
RMRE1J1D–. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. 42 British Uredinecs and Ustilagine<2. like Puccinia spores, but have, in the European species, generally two germ-pores in each cell, and these are placed. Fig. 3.—Chrysomyxa rJwdodendri. Section of spore-bed showing the compound teleu- tospores (a), one of which is in the act of germination, having emitted a promycelium (^) from upper corner of its super
RMPG4EHA–. Minnesota plant diseases. Plant diseases. 390 Minnesota Plant Diseases. remain in the cells of the host. The cluster-cups are found on the leaves of some coniferous tree. Spruces in the neighbor- hood of affected cow- berry plants often show an abundance of cluster cups and are usually most seriously attacked in the lower branches. It has not been proven in our American plants that these two stages are con- nected, but there seems to be considerable proba- bility that such is the case. Rust of a n emon e (Puccinia fusca Relh.). Anemone, Thalictrum and allied genera are sub- ject to the attac
![. Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil Stock Photo](https://c8.alamy.com/comp/RDDC25/photomicrographs-of-botanical-studies-photomicrography-mycelium-of-fungus-conidiophores-fruiting-bodies-6-ts-leaf-of-thistle-puccinia-graminis-carduusquot-attacked-by-uredospores-of-uredospores-mycelium-of-fungus-disorganised-tissue-of-leaf-disorganized-palisade-layer-f-upper-cuticle-of-leaf-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-flatters-milborne-amp-mckechnie-ltd-manchester-flaters-mil-RDDC25.jpg ". Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil Stock Photo")
RMRDDC25–. Photomicrographs of botanical studies. Photomicrography. Mycelium of fungus. Conidiophores (fruiting bodies). 6. T.S. Leaf of Thistle puccinia graminis. Carduus," attacked by uredospores of. Uredospores. Mycelium of fungus. Disorganised tissue of leaf Disorganized palisade layer. f Upper cuticle of leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Flatters, Milborne & McKechnie Ltd. Manchester : Flaters, Mil
RMPG4ER2–. Minnesota plant diseases. Plant diseases. 3i8 Minnesota Plant Diseases. been reported from a greenhouse in this state where it de- stroyed almost an entire winter crop of mint. The complete destruction of all diseased plants and espe- cially all subterranean portions is necessary. (Fig. 209.) Asparagus rust (Puccinia asparagi DC). Of recent years this rust of asparagus has become of great importance in the eastern states and in California and will undoubtedly soon be of equal importance in this state. In parts of eastern states aspar- agus culture in whole districts has been ruined by this p
RMRDJ5FA–. Microbes, ferments and moulds . Bacteria; Fungi; Fermentation. PAEASITIC FUNGI AND MOULDS. 15 Basidiomycetea have no endogenous spores, but they may have as many as four forms of exogenous spores. This is the case with the rust of wheat, termed by naturalists Uredo or Puccinia graminis, which appears in the spring on the blades of this plant. The patches of rust are covered with a fine dust, which, under the microscope, is seen to consist of small elongated bodies of a reddish brown, resting on a filament; these are the first spores of the fungus, and are termed iiredospores (Fig. 5). If the
RMPG0GA2–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. so. Chrysanthemum Diseases. a. Botrytis blossom rot, healthy and diseased (after Spaulding), b. ray blight (after Stevens, F. L.), c. chrysanthemum rust (after Smith. R. E.). d. Urc- dospores of Puccinia chrysanthemi, e. Cylindrosporium fungus, /. Cylindro- sporium blight (e and f after Halsted).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
![. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 264 PUCCINIA membrane marked with about nine (7—10) germ-pores, which are each surrounded by a little thickening of the cell-wall, so that they look some- what like a " bordered pit" ; the teleuto-soi'i mostly on the lower leaf-surface or sheath, black, covered by the epidermis ; the teleutospores oboonical or with nearly parallel sides, truncate, rounded, or pointed (obtusely and often obliquely) at the apex ; the slightly thickened apical wall and a broad band at the base chestnut-brown, but the rem Stock Photo](https://c8.alamy.com/comp/RE1WPE/the-british-rust-fungi-uredinales-their-biology-and-classification-rust-fungi-264-puccinia-membrane-marked-with-about-nine-710-germ-pores-which-are-each-surrounded-by-a-little-thickening-of-the-cell-wall-so-that-they-look-some-what-like-a-quot-bordered-pitquot-the-teleuto-soii-mostly-on-the-lower-leaf-surface-or-sheath-black-covered-by-the-epidermis-the-teleutospores-oboonical-or-with-nearly-parallel-sides-truncate-rounded-or-pointed-obtusely-and-often-obliquely-at-the-apex-the-slightly-thickened-apical-wall-and-a-broad-band-at-the-base-chestnut-brown-but-the-rem-RE1WPE.jpg ". The British rust fungi (Uredinales) their biology and classification. Rust fungi. 264 PUCCINIA membrane marked with about nine (7—10) germ-pores, which are each surrounded by a little thickening of the cell-wall, so that they look some- what like a " bordered pit" ; the teleuto-soi'i mostly on the lower leaf-surface or sheath, black, covered by the epidermis ; the teleutospores oboonical or with nearly parallel sides, truncate, rounded, or pointed (obtusely and often obliquely) at the apex ; the slightly thickened apical wall and a broad band at the base chestnut-brown, but the rem Stock Photo")
RMRE1WPE–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 264 PUCCINIA membrane marked with about nine (7—10) germ-pores, which are each surrounded by a little thickening of the cell-wall, so that they look some- what like a " bordered pit" ; the teleuto-soi'i mostly on the lower leaf-surface or sheath, black, covered by the epidermis ; the teleutospores oboonical or with nearly parallel sides, truncate, rounded, or pointed (obtusely and often obliquely) at the apex ; the slightly thickened apical wall and a broad band at the base chestnut-brown, but the rem
![. Photomicrographs of botanical studies. Photomicrography. 14 Pliotoinicrograplis of Botanical Studies. 7- T.S. Stem of Wheat, " Triticum." Attacked by teleutospores of puccinia graminis.. Teleutospores. Alycelium of fungus. Disorganised tissue of Stem. Vascular bundle in normal condition. 8. T.S. Leaf of Berbery. Attacked by aecidiaspores of puccinia graminis. 4 -'^-^ -^ Fully-developed acidium. ^i-' )'^-f',' ' T, ', j-.-'!#r" Mycelium of fungus. I v'' ;â ' <-"''*ff : â ' 'JSi- â Disorganised tissue of leaf. Spermogone of unlinown function.. Please note that thes Stock Photo](https://c8.alamy.com/comp/PG029B/photomicrographs-of-botanical-studies-photomicrography-14-pliotoinicrograplis-of-botanical-studies-7-ts-stem-of-wheat-quot-triticumquot-attacked-by-teleutospores-of-puccinia-graminis-teleutospores-alycelium-of-fungus-disorganised-tissue-of-stem-vascular-bundle-in-normal-condition-8-ts-leaf-of-berbery-attacked-by-aecidiaspores-of-puccinia-graminis-4-fully-developed-acidium-i-f-t-j-!rquot-mycelium-of-fungus-i-v-lt-quotff-jsi-disorganised-tissue-of-leaf-spermogone-of-unlinown-function-please-note-that-thes-PG029B.jpg ". Photomicrographs of botanical studies. Photomicrography. 14 Pliotoinicrograplis of Botanical Studies. 7- T.S. Stem of Wheat, " Triticum." Attacked by teleutospores of puccinia graminis.. Teleutospores. Alycelium of fungus. Disorganised tissue of Stem. Vascular bundle in normal condition. 8. T.S. Leaf of Berbery. Attacked by aecidiaspores of puccinia graminis. 4 -'^-^ -^ Fully-developed acidium. ^i-' )'^-f',' ' T, ', j-.-'!#r" Mycelium of fungus. I v'' ;â ' <-"''*ff : â ' 'JSi- â Disorganised tissue of leaf. Spermogone of unlinown function.. Please note that thes Stock Photo")
RMPG029B–. Photomicrographs of botanical studies. Photomicrography. 14 Pliotoinicrograplis of Botanical Studies. 7- T.S. Stem of Wheat, " Triticum." Attacked by teleutospores of puccinia graminis.. Teleutospores. Alycelium of fungus. Disorganised tissue of Stem. Vascular bundle in normal condition. 8. T.S. Leaf of Berbery. Attacked by aecidiaspores of puccinia graminis. 4 -'^-^ -^ Fully-developed acidium. ^i-' )'^-f',' ' T, ', j-.-'!#r" Mycelium of fungus. I v'' ;â ' <-"''*ff : â ' 'JSi- â Disorganised tissue of leaf. Spermogone of unlinown function.. Please note that thes
RMRDD1P5–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER III.—SPORES OF FUNGI. lOI Others perform no such function and are therefore only simple pores or pits. The position of the pores on the membrane is different in different species. The spores, for instance, of Sordaria fimiseda, de Not. have at their apex a germ-pore which is closed only by the outermost lamella of the membrane (Fig. 52). The germ-pores of the uredospores which I have examined, those of Puccinia for example and Uromyces, are sharply defined rou
RMPG4EWD–. Minnesota plant diseases. Plant diseases. 2 88 Minnesota Plant Diseases. tion the mycelium rapidly drains away the nourishment which should go to the heads and allows of an uncontrollable evapora- tion of water through the broken skins; as a result the berries •do not fill but remain shriveled. Such wheat therefore, even if not entirely ruined, suffers a loss of grade.. ViG. 144.—Cluster-cups of the crown rust of wheat (Puccinia coronata), on swollen cushions of the stem of the alder-leaved buckthorn. Photograph by Arthur and Holway. It is also known that in states south of Minnesota the sum
RMRE37G0–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 192 PUCCINIA This species was included by Sydow under the old P. bullata of Winter ; but since then it has been rendered probable by the experiments of Semadeni that it is distinct from most of the forms still remaining under that collective name (Centralbl. f. Bakter. 1904, 2. xiii. 530). Schroter proved that the spore-forms described above are genetically connected. The uredo- and teleutospores are generally found intermixed. 64. Puccinia Angelicae Fckl. Uredo Angelicas Sohum. PI. Sail. ii. 233. Trichohasis A
RMPG4645–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 327 O. Pycnia or pycnial stage I. .Ecia or tecial stage II. Uredinia or uredinia stage III. Telia or telial stage The spores in all cases, except those of the basidiospores and. Fig. 241.—Amphispores, urediuiospores and teliospores of Puccinia vexans. After Holway. pycniospores arise by direct conversion of a mycelial cell into a spore, i. e., they are chlamydospores. Mesospore is a term applied to occasional unicellular forms of teliospores found in Puccinia and related genera which do not usual
RMRDHRWE–. Fungi; their nature and uses. Fungi. 146 FUNGI.. Fig. 85.—Germinating pseudospore of Puccinia Molinice. (Tulasne.) pears. The form of the latter is at first globular, then ellipsoid, and more or less curved. All these phases of vegetation are accomplished in less than twelve hours, and if the spore is mature and ready for germina- tion, it is sufficient to provoke it by keeping the pseudospores in a humid atmosphere. During this process the two cells do not sepa- rate, nor does one commence ger- mination before the other, but both simultaneously. When the sporules are produced, the proto- sp
RMPG4B4E–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 358 UKEDINEAE. some confusion between plants infested with this Puccinia and those with species of Aecidium. The changes induced on anemone by either Aecidium leucospermum D.C. or Aec. puTictatum Pers. are quite distinct (Fig. 190).. Fig. 191.—Puceinia ribis on Red Currant {Ribes rubrum). Teleutospore-patches on leaves and fruit, (v. Tubeuf phot.) P. singularis Magu. On Anemone ranunculoides in Austria and south-eas
RMRE38AG–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. PUCCINIA POARUM 47 as shown in radial section. Tiie outer edge of each cell is more prolonged downwards so as to overlap a portion of the cell below in an imbricated manner. The secidium, in both, as is the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Grove, W. B. (William Bywater), 1848-1938. Cambridge, University Press
RMPG4EXF–. Minnesota plant diseases. Plant diseases. 284 Minnesota Plant Diseases. The leaf underneath the spots is abnormally increased in size and distorted in shape. The pycnidia usually accompany the cluster cups and come from the same mycelium', but are gen- erally to be found on the upper surface of the leaf. They are probably male-cell receptacles which have lost their fertilizing- power and are now functionless. They illustrate a persistence of a habit after its usefulness has passed, a by no means uncommon phenomenon in nature.. f ^ ^ 1 Fig. 140.—Stem rust of wheat (Puccinia graminis). A secti
RMRE1N8B–. College botany; structure, physiology and economics of plants. Botany. 284 COLLEGE BOTANY Puccinia graminis. The mycelium lives within the host, coming to the surface for the production of two kinds of spores. The urediniospores (or uredospores) or summer spores are borne singiy and are unicellular. They germinate readily and cause new infections. The teliospores (or teleutospores) or winter spores are borne singly and are two-celled. They germinate the. Fig. 134.—Apple rust following spring, producing a promycelium which bears sporidia in groups of four. The sporidia correspond to the spore
RMPG4CH2–. Diseases of truck crops and their control . Vegetables. 'tx^ >. Pig. 52. Asparagus Diseases. a. Asparagus rust on stems, showing sori with winter spores, 6. cluster cup stage of Puccinia asparagi, c. Uredo or summer spores of P. asparagi. d. Teleuto or winter spores of P. asparagi (6. to d. after R. E. Smith).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Taubenhaus, Jacob Joseph, 1884-1937. New York : E. P. Dutton
RMRE37WX–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 146 PUCCINIA these latter that new infections arise in the spring as soon as the shoots appear. The hibernation of the mycelium in the rhizome, which is stated by Plowright, has not been proved. The germ-pores are very easy to see in the uredospores of this species and its allies. Each is often surrounded by a border like a bordered pit, an appearance caused by a thickening of the membrane around and over the pit. As usual the appearance of the spore changes according as it is wet or dry ; if wet, it may appear
![. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 391 posed of three cells arranged in clover-leaf fashion. The spore clusters are usually very dense and vary in size from a pin- head's width to three-quarters inch broad. The leaf under the spores colors black, so that the groups can readily be seen from the upper surface of the leaf. Cluster cups and summer spores are not known for this rust. Rust of sedges [Puccinia caricis (Sghum.) Reb.]. This is an exceedingly common rust on many Minnesota sedges. The summer and winter spores are produced on the sedge plant and the clus Stock Photo](https://c8.alamy.com/comp/PG4EH2/minnesota-plant-diseases-plant-diseases-minnesota-plant-diseases-391-posed-of-three-cells-arranged-in-clover-leaf-fashion-the-spore-clusters-are-usually-very-dense-and-vary-in-size-from-a-pin-heads-width-to-three-quarters-inch-broad-the-leaf-under-the-spores-colors-black-so-that-the-groups-can-readily-be-seen-from-the-upper-surface-of-the-leaf-cluster-cups-and-summer-spores-are-not-known-for-this-rust-rust-of-sedges-puccinia-caricis-sghum-reb-this-is-an-exceedingly-common-rust-on-many-minnesota-sedges-the-summer-and-winter-spores-are-produced-on-the-sedge-plant-and-the-clus-PG4EH2.jpg ". Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 391 posed of three cells arranged in clover-leaf fashion. The spore clusters are usually very dense and vary in size from a pin- head's width to three-quarters inch broad. The leaf under the spores colors black, so that the groups can readily be seen from the upper surface of the leaf. Cluster cups and summer spores are not known for this rust. Rust of sedges [Puccinia caricis (Sghum.) Reb.]. This is an exceedingly common rust on many Minnesota sedges. The summer and winter spores are produced on the sedge plant and the clus Stock Photo")
RMPG4EH2–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 391 posed of three cells arranged in clover-leaf fashion. The spore clusters are usually very dense and vary in size from a pin- head's width to three-quarters inch broad. The leaf under the spores colors black, so that the groups can readily be seen from the upper surface of the leaf. Cluster cups and summer spores are not known for this rust. Rust of sedges [Puccinia caricis (Sghum.) Reb.]. This is an exceedingly common rust on many Minnesota sedges. The summer and winter spores are produced on the sedge plant and the clus
RMRE381A–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 128 PUCCINIA. Concerning the difference between tliis species and U. Dactt/lidis (apart from the habitat) little that is definite can be said. Some authors unite them, but I find the teleutospores of U. Poae to be usually more oblong and often pro'ided with shorter pedicels and the sori to be less consiiicuous. The leaves of Pon are smaller than those of Dtirti/lis, and the telcuto-sori do not cover them in such enormous numbei's and never extend to the culms. .Juel divides this sjiecies into 9 or 10 biologica
![. Minnesota plant diseases. Plant diseases. 2 86 Minnesota Plant Diseases.. Fig. 142.—Spores of the common "black rust" (Puccinia graminis) of wheat. 1. Cluster-cup spores from the barberry plant. 2. Summer spores from the wheat plant. 3. Winter spores from the wheat plant. Highly magnified. After Arthur and Holway. aggerated because the smaller losses due to the presence of the rust in very slight and therefore unheeded quantities may never be computed. These are, nevertheless, a' certain loss. There is only a difference in degree. The en- tire eHmination of /^^^^^ rust would theref Stock Photo](https://c8.alamy.com/comp/PG4EXG/minnesota-plant-diseases-plant-diseases-2-86-minnesota-plant-diseases-fig-142spores-of-the-common-quotblack-rustquot-puccinia-graminis-of-wheat-1-cluster-cup-spores-from-the-barberry-plant-2-summer-spores-from-the-wheat-plant-3-winter-spores-from-the-wheat-plant-highly-magnified-after-arthur-and-holway-aggerated-because-the-smaller-losses-due-to-the-presence-of-the-rust-in-very-slight-and-therefore-unheeded-quantities-may-never-be-computed-these-are-nevertheless-a-certain-loss-there-is-only-a-difference-in-degree-the-en-tire-ehmination-of-rust-would-theref-PG4EXG.jpg ". Minnesota plant diseases. Plant diseases. 2 86 Minnesota Plant Diseases.. Fig. 142.—Spores of the common "black rust" (Puccinia graminis) of wheat. 1. Cluster-cup spores from the barberry plant. 2. Summer spores from the wheat plant. 3. Winter spores from the wheat plant. Highly magnified. After Arthur and Holway. aggerated because the smaller losses due to the presence of the rust in very slight and therefore unheeded quantities may never be computed. These are, nevertheless, a' certain loss. There is only a difference in degree. The en- tire eHmination of /^^^^^ rust would theref Stock Photo")
RMPG4EXG–. Minnesota plant diseases. Plant diseases. 2 86 Minnesota Plant Diseases.. Fig. 142.—Spores of the common "black rust" (Puccinia graminis) of wheat. 1. Cluster-cup spores from the barberry plant. 2. Summer spores from the wheat plant. 3. Winter spores from the wheat plant. Highly magnified. After Arthur and Holway. aggerated because the smaller losses due to the presence of the rust in very slight and therefore unheeded quantities may never be computed. These are, nevertheless, a' certain loss. There is only a difference in degree. The en- tire eHmination of /^^^^^ rust would theref
![. Botany of the living plant. Botany. EU-MYCETES.- (&) BASIDIOMYCETES 443 colour of rust of iron. They are found in sueh quantity as to attraet public attention, and this has provided tlie name. The most familiar example, as it is also economically the most important, is the Rust of Wheat, Puccinia graminis. In June and July the green leaves of the Wheat are often seen to lose their colour (^^"'g- 375)- Yellow patches appear between the veins, and run together into Imcs that follow the softer mesophyll. The epidermis bursts, and innumerable orange spores are set free, which are easily Stock Photo](https://c8.alamy.com/comp/RDY624/botany-of-the-living-plant-botany-eu-mycetes-amp-basidiomycetes-443-colour-of-rust-of-iron-they-are-found-in-sueh-quantity-as-to-attraet-public-attention-and-this-has-provided-tlie-name-the-most-familiar-example-as-it-is-also-economically-the-most-important-is-the-rust-of-wheat-puccinia-graminis-in-june-and-july-the-green-leaves-of-the-wheat-are-often-seen-to-lose-their-colour-quotg-375-yellow-patches-appear-between-the-veins-and-run-together-into-imcs-that-follow-the-softer-mesophyll-the-epidermis-bursts-and-innumerable-orange-spores-are-set-free-which-are-easily-RDY624.jpg ". Botany of the living plant. Botany. EU-MYCETES.- (&) BASIDIOMYCETES 443 colour of rust of iron. They are found in sueh quantity as to attraet public attention, and this has provided tlie name. The most familiar example, as it is also economically the most important, is the Rust of Wheat, Puccinia graminis. In June and July the green leaves of the Wheat are often seen to lose their colour (^^"'g- 375)- Yellow patches appear between the veins, and run together into Imcs that follow the softer mesophyll. The epidermis bursts, and innumerable orange spores are set free, which are easily Stock Photo")
RMRDY624–. Botany of the living plant. Botany. EU-MYCETES.- (&) BASIDIOMYCETES 443 colour of rust of iron. They are found in sueh quantity as to attraet public attention, and this has provided tlie name. The most familiar example, as it is also economically the most important, is the Rust of Wheat, Puccinia graminis. In June and July the green leaves of the Wheat are often seen to lose their colour (^^"'g- 375)- Yellow patches appear between the veins, and run together into Imcs that follow the softer mesophyll. The epidermis bursts, and innumerable orange spores are set free, which are easily
RMPG4FEJ–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 159 Rusts (UredinecB). The rust fungi constitute a larger group of plants than the smuts and exhibit more variety of structure and habit. They may be considered as relatives of the smuts in that the winter spores of the latter may be compared with. Fig. 73.—Spores of rust fungi. 1. A cluster of winter spores of wheat rust (Puccinia graminis) on wheat plant. 2. A winter spore germinating to a thread of four cells (promycelium—basidium), each of which bears a small spore (sporidium) on a stalk. The winter spore germinates in t
RMRE37P1–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 168 PUCCINIA the fusiform shape, thin walls, and pale colour of the teleutospores, which often become totally devoid of thickening at the apex, by the dropping off of the pale thickening cap, on germination. P. punctata is additionally distinguished by the presence of the seoidium. Fischer explains the fact, that distortions more usually accompany P. Valantiae, by the consideration that infection takes place from the basidiospores mainly through the cuticle of young and still growing parts, while teleuto-sori o
RMPG4EX1–. Minnesota plant diseases. Plant diseases. FiG. 143.—Spores of crown rust of wheat (Puccinia coronata). w. Win- ter spores, with a crown of finger- like protuberances at the top of each spore; from the wheat plant, a. Summer spores from the wheat plant, c. Cluster-cup spores from the alder-leaved buckthorn. Highly magnified. After Arthur and Hol- way. mon wild grasses, including squirrel tail grass (Hordeum jubatum), and also that the rust from these can infect wheat plants. This is a very discouraging feature, for it seems almost impossible to eliminate all of these weeds. Unless this is don
RMRDC143–. Botany for agricultural students . Botany. SUMMARY OF BAKIDIOMYCETES 403 Asparagus Rust. — Asparagus is often attacked by a Rust (Puccinia Asparagi) which is a type of those having but one host. The uredospores, teleutospores, and aecidiospores all occur on the Asparagus. Some other forms of Rusts of some importance occur on Clover, Alfalfa, Beans, Peas, Beets, Timothy, Corn, Peach trees, etc. Summary of Basidiomycetes. — Like the Ascomycetes the Basidiomycetes are parasites or saprophytes on land plants and have no motile spores. The Basidiomycetes are supposed to sporidia. aecidiospores Fi
RMPG41FG–. Essentials of botany. Botany; Botany. 256 ESSENTIALS OF BOTANY one is known as the cluster-cup stage and the others as red . rust and llach rust, according to the usual approximate color of the spores. The rust called Puccinia graminis, growing on wheat, has its cluster-cup stage on the leaves of barberry in June. The spores from the cluster-cups are carried by the wind to the wheat, where they germi- nate and in a few days produce the red rust. A little later the black spores appear, produced by the same myce- lium. This growth is chiefly upon the stems and sheaths.. Fig. 181. A Cluster-Cup
RMRDJ5WP–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PROTOBASIDIOMYCETES 409 Probably the most important species of the rust family, both from an economic point of view and also from the point of view of the development of mycological research, is the common species, Puccinia graminis, upon cereals. It was upon this species that the classical researches of De Bary (1865 et seq.) were based, throwing light upon many phenomena of parasitism. In more recent times this species has served further as a means of developing a knowledge of bi
![. The fungi which cause plant disease . Plant diseases; Fungi. 384 THE FUNGI WHICH CAUSE PLANT DISEASE P. simplex (Korn.) Er. & He. I. Unknown. II and III on barley in Europe and seemingly of recent intro- duction into the United States.'*"^ One of the least important of the grain rusts. Mesospores are common. P. sorghi Schw.^s" I (=^. oxalidis). Peridia hypophyllous, rarely amphigenous, crowded, concentric, epispore smooth, 24-28 fi. II. Uredinia amphigenous, numerous, often confluent; spores globose to ovate, 23-30 x 22-26 mm., slightly verrucose.. Fig. 277.—Puccinia aorghi. Af Stock Photo](https://c8.alamy.com/comp/PG45YN/the-fungi-which-cause-plant-disease-plant-diseases-fungi-384-the-fungi-which-cause-plant-disease-p-simplex-korn-er-amp-he-i-unknown-ii-and-iii-on-barley-in-europe-and-seemingly-of-recent-intro-duction-into-the-united-statesquot-one-of-the-least-important-of-the-grain-rusts-mesospores-are-common-p-sorghi-schwsquot-i-=-oxalidis-peridia-hypophyllous-rarely-amphigenous-crowded-concentric-epispore-smooth-24-28-fi-ii-uredinia-amphigenous-numerous-often-confluent-spores-globose-to-ovate-23-30-x-22-26-mm-slightly-verrucose-fig-277puccinia-aorghi-af-PG45YN.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 384 THE FUNGI WHICH CAUSE PLANT DISEASE P. simplex (Korn.) Er. & He. I. Unknown. II and III on barley in Europe and seemingly of recent intro- duction into the United States.'*"^ One of the least important of the grain rusts. Mesospores are common. P. sorghi Schw.^s" I (=^. oxalidis). Peridia hypophyllous, rarely amphigenous, crowded, concentric, epispore smooth, 24-28 fi. II. Uredinia amphigenous, numerous, often confluent; spores globose to ovate, 23-30 x 22-26 mm., slightly verrucose.. Fig. 277.—Puccinia aorghi. Af Stock Photo")
RMPG45YN–. The fungi which cause plant disease . Plant diseases; Fungi. 384 THE FUNGI WHICH CAUSE PLANT DISEASE P. simplex (Korn.) Er. & He. I. Unknown. II and III on barley in Europe and seemingly of recent intro- duction into the United States.'*"^ One of the least important of the grain rusts. Mesospores are common. P. sorghi Schw.^s" I (=^. oxalidis). Peridia hypophyllous, rarely amphigenous, crowded, concentric, epispore smooth, 24-28 fi. II. Uredinia amphigenous, numerous, often confluent; spores globose to ovate, 23-30 x 22-26 mm., slightly verrucose.. Fig. 277.—Puccinia aorghi. Af
RMRE38DP–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ueedospobes » The Uredospoees. The germ-tube soon forms a more or less extensive my- celium, which may penetrate the greater part of the leaf of the Carex, but in many species of Puccinia is strictly localised to a small defined spot. All its cells are binucleate, like the spore from which it originated. The cells of the mycelium, in every stage, send haustoria into the cells of the host; when an haustorium arises from a binucleate mycelium, it is itself. Fig. 8. Section of leaf of Carex paludosa, with a sorus
RMPG450J–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 204 MYCOLOGY Dandelion Rust, Puccinia iaraxaci, on the dandelion Taraxacum officinale, rather common in Europe, North America, Japan and the East Indies. Reed Grass Rust, Puccinia phragmitis, with aecia on Rumex crispus, R. obtusifolius and urediniospores and teliospores on reed grass Phrag- mites communis.. Fig. 73.—Roeslclia auranliaca on fruit oi Amelanchicr intermedia corresponding to Gymnosporangium clavipes on red cedar. (Shelter Island, New York, July 16, 19.15) Ash Rust, Puccini
RMRDPFY4–. My garden, its plan and culture together with a general description of its geology, botany, and natural history. Gardening. Fig. 851.—Cystopus candidus, nat. size and magniiied. Fig. 857 a.—CoprinUs atramentarius creeps through the cellular tissue of the plants, and after a time gives rise to zoospores or moving bodies to perpetuate the species. I believe that in all these cases the plant is previously pierced by an aphis. Our sweet-williams are frequently attacked on the upper surface of the leaf with jet-black spots, which is a fungus called the Puccinia lyclt- nidearztm (fig. 852). This s
RMPG4508–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 2o6 MYCOLOGY Rust of Stone Fruits, Puccinia pruni-spinoscE, occurs on various species of the genus Prunus in the southern and central United States.. Fig 76—Fully expanded cedar apple on red cedar. Long yellow teliosori as bnger-hke projections are seen. {After Jones and Bartholomew, Bull. 2S7. Agric Exper. Stat., Vmv. Wise, July, 1915.) The aecial stage occurs on Anemone and Hepatica, and is known as jEcidium punctatum. Hollyhock Rust, Puccinia malmcearum (Fig. 72), is found over the w
RMRE387N–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 86 UROMYCES The species are arrange^ according to the families to which the hosts belong: see Puccinhh^ This genus is often considered the most highly (at least the latest) evolved of the Uredinales; but rather it forms a heterogeneous group, the species of which have arisen at different times from various species of Puccinia. 1. Uromyces Valerianae Fckl. Uredo Valerianae Solium. PL Sail. ii. 233. ^cidiwn Valerianearum Duby, Bot. Gall. ii. 908. Cooke, Handb. p. 540; Micr. Fung. p. 196. Lecythea Valerianae Berk
RMPG4520–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 66.—A, Chain of young asciospores of Puccinia caricis; a, fusion tissue; b, basal (fusion) cell with conjugate nuclei; t, seciospore mother-cell; d, intercalary cell; e, young seciospore; B, germinating aeciospore of P. caricis; C, teliospore of P. caricis; D, formation of teliospores of P. falcarice (after Ditlscklag); E, development of aecium (after Blackman) of Phragmidium violaceum; e, epidermal cell; i, sterile cell; below these cells a nucleus is seen migrating into the adjac
![. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 38 ! J! Asparagus. Rust (Puccinia asparagi). This disease is very commmi and is familiar to every grower of asparagus. It has three distinct stages. The first is known as the "cluster-cup" stage or the spring form. In this stage the spores are produced in cup-shaped pustules, which are grouped in oval clusters and are orange-yellow when mature. This stage is seldom noticed by asparagus growers. The second or summer stage. Fig. 48. Asparagus Rust. 1, attacked stem showing spore clusters; Stock Photo](https://c8.alamy.com/comp/REN482/insects-affecting-vegetables-microform-lgumes-vegetables-insect-pests-insectes-nuisibles-38-!-j!-asparagus-rust-puccinia-asparagi-this-disease-is-very-commmi-and-is-familiar-to-every-grower-of-asparagus-it-has-three-distinct-stages-the-first-is-known-as-the-quotcluster-cupquot-stage-or-the-spring-form-in-this-stage-the-spores-are-produced-in-cup-shaped-pustules-which-are-grouped-in-oval-clusters-and-are-orange-yellow-when-mature-this-stage-is-seldom-noticed-by-asparagus-growers-the-second-or-summer-stage-fig-48-asparagus-rust-1-attacked-stem-showing-spore-clusters-REN482.jpg ". Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 38 ! J! Asparagus. Rust (Puccinia asparagi). This disease is very commmi and is familiar to every grower of asparagus. It has three distinct stages. The first is known as the "cluster-cup" stage or the spring form. In this stage the spores are produced in cup-shaped pustules, which are grouped in oval clusters and are orange-yellow when mature. This stage is seldom noticed by asparagus growers. The second or summer stage. Fig. 48. Asparagus Rust. 1, attacked stem showing spore clusters; Stock Photo")
RMREN482–. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 38 ! J! Asparagus. Rust (Puccinia asparagi). This disease is very commmi and is familiar to every grower of asparagus. It has three distinct stages. The first is known as the "cluster-cup" stage or the spring form. In this stage the spores are produced in cup-shaped pustules, which are grouped in oval clusters and are orange-yellow when mature. This stage is seldom noticed by asparagus growers. The second or summer stage. Fig. 48. Asparagus Rust. 1, attacked stem showing spore clusters;
RMPG4B55–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 354 UREDINEAE. P. elymi West. {Jiostrupia elymi Lagerh.). On Elymus arenarvus and E. mollis. P. Baryi (Berk, et Br.). On Brachypodium in Europe and Britain, Bamhusa Thouarsii in India, Andropogon, etc., iu America. P. longissima Schroet. On Koeleria cristata in Germany ; K. Berytkna in Egypt. Fig. 187.—Puccinia sorghi (Puce, maydia). Portion of Maize-leaf showing spore- patches, (v. Tubeuf. del.). FlQ. 189.—Fuecinia
RMRE378E–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 240 PUCCINIA Spermogones. Epiphyllous, in roundish clusters. JEcidiospores. MQ,da& epiphyllous, on roundish yellow spots, in orbicular clusters as much as 1 cm. diam. surrounding a group of spermogones, scutelliform, yellow, with a slightly and irregularly torn -'narrow margin; spores delicately verruculose, orange, 12—20 ^u,. Uredospores. Sori scattered or in rows, often confluent, oblong, ellijjtical or linear, long covered by the swollen epidermis which is at length longitudinally split, ferruginous; sp
RMPG43MX–. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. Fig. 45.—The Summer Wheat Mildew (Puccirda graminis). A. A section of a portion of a sorus of Fredo linearis (the early stage of P. gramiTiis) x 195. B. A section of a portion of a sorus of PucciTim jrammis .(later stage) x 195. C. Genoinating teleutospore. x 490. D. TJredospore (1), Teleutospore (2), Pro-mycelium spore (3). x 490. black disease spots belonging to the Puccinia, mildew, or perfect state of this fungoid growth. If a transverse section (Fig. 45 B) of one of the di
RMRDC16T–. Botany for agricultural students . Botany. BLACK RUST OF GRAIN (PUCCINIA GRAMINIS) 397. Rye, and Barley, and occurs on other Grasses. The presence of the mycelium in the host is first known through the appearance of reddish spots or lines on the stems and leaves in late spring or early sum- mer. The reddish spots or lines are regions of spore production. They are pustules or blister- like structures caused by masses of spore-bearing hyphae which push up the epidermis until it is finally ruptured (Fig. 353). The reddish color of the pustules is due to the reddish color of the spores. These sp
RMPG460B–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 377. Fio. »73> -Cross-section of aecia of P. asparagi. After Smith. P. bullata (Pers.) Schr. is a brachy-puccinia which is autoecious on celery, parsley, dill and other Timbellifers. P. apn (Wallr.) Gda. abo occurs in its uredinial and telial stages on celery .- P. castagnei Thiim is recorded for celery in France. P. allii (D. C.) Rud. is a hemi-type on cultivated onions. P. porri Sow. is an autoecious rust which is sometimes- de- structive to onions in Europe. P. endiviae Pass.^^^ occurs on-
RMRDPFY1–. My garden, its plan and culture together with a general description of its geology, botany, and natural history. Gardening. Fig. 851.—Cystopus candidus, nat. size and magniiied. Fig. 857 a.—CoprinUs atramentarius creeps through the cellular tissue of the plants, and after a time gives rise to zoospores or moving bodies to perpetuate the species. I believe that in all these cases the plant is previously pierced by an aphis. Our sweet-williams are frequently attacked on the upper surface of the leaf with jet-black spots, which is a fungus called the Puccinia lyclt- nidearztm (fig. 852). This s
RMPG4511–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 202 MYCOLOGY repens, Elymus arenarius, Bromus secalinus and others; (3) f. sp. avenm on oats and Avena elatior, Dactylis glomerata, Alopecurus praten- sis, Milium efusum, etc.; (4) f. sp. pocB on Poa compressa and P. praten- sis; (s) f. sp. airce on Aira cmspitosa and A. hottnica; (6) f. sp. agrosHs on Agrostis canina and A. stolonifera. Brown Rust of Rye, Puccinia dispersa, with its cluster cups on Anchusa arvensis and A. officinalis. Crown Rust of Oats, Puccinia coronifera, with its a
RMRE1GJ3–. Fungi; their nature, influence, and uses;. Fungi. Fig. 58.— Pseudospores of Thecaphora hyatina. Fig. 59.—Pseudospores of Puccinia. Fig. 60.—Pseudosjjores of Tri^Uragmium. In the Puccinitsi the distinctiye features of the genera are based upon the more or less complex nature of the pseudospores, which. Fig. 61.—Pseudospores of Phragmidium. butbosuiii. Fig. 62.—Melampaora salicina. (Winter fruit.) are bilocular in Puccinia, trilocular in TripJiragmium, multilocular in Phragmidium, &c. In the curious genus Podisoma the septate. Please note that these images are extracted from scanned page i
RMPG449X–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 5i8 SPECIAL PLANT PATHOLOGY. Fig. 187.—Hollyhock rust, Puccinia malvacearum. i, Typic mature telio- spore; 2-6, different stages in growth of promycelium (basidium); 7, forked promy- celium; 8, basidium dividing into 4 cells; 9, basidium resembling a germ tube; 10—12, cells breaking apart; 13-16, germination of promycelial cells; 17, empty cell; 18, mature basidiospores; 19, 20, same in germination; 25, 26, formation of chlamydo- spore-like bodies in old promycelia. {After Taubenhaus, J
RMRDD7T8–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. PUCCINIA. 343 hyphae forming the bottom of the aecidium-cup. These hyphae give rise to numerous short sporophores, from each of which a single long chain of spores is abjointed in basipetal succession, the spores being at first separated by temporary intermediate cells. The sporophores round the margin of each aecidium do not, however, give off spores; they also produce chains of cells basipetally, but these grow la
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 389 P. gentianae Strauss is a eu-puccinia on many species of cul- tivated gentians. P. gladioli Cast occurs on gladiolus. P. gran- ulans Kale. & Cke. is on cultivated Pelargoniums in France;-™ P. tulipae Schr. on tulips; P. scillae Lk. on Scilla; P. schroeteri Pass, on Narcissus in Europe. P. pazschkei Diet, is a lepto- puccinia on cultivated saxifrages in Europe. P. horiana Hen.. p. dianthi. After Holway. is destructive on Chrysanthemums in Japan.^"' P. iridis (D. C.) Duby, a hemi-pucci Stock Photo](https://c8.alamy.com/comp/PG45YG/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-389-p-gentianae-strauss-is-a-eu-puccinia-on-many-species-of-cul-tivated-gentians-p-gladioli-cast-occurs-on-gladiolus-p-gran-ulans-kale-amp-cke-is-on-cultivated-pelargoniums-in-france-p-tulipae-schr-on-tulips-p-scillae-lk-on-scilla-p-schroeteri-pass-on-narcissus-in-europe-p-pazschkei-diet-is-a-lepto-puccinia-on-cultivated-saxifrages-in-europe-p-horiana-hen-p-dianthi-after-holway-is-destructive-on-chrysanthemums-in-japanquot-p-iridis-d-c-duby-a-hemi-pucci-PG45YG.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 389 P. gentianae Strauss is a eu-puccinia on many species of cul- tivated gentians. P. gladioli Cast occurs on gladiolus. P. gran- ulans Kale. & Cke. is on cultivated Pelargoniums in France;-™ P. tulipae Schr. on tulips; P. scillae Lk. on Scilla; P. schroeteri Pass, on Narcissus in Europe. P. pazschkei Diet, is a lepto- puccinia on cultivated saxifrages in Europe. P. horiana Hen.. p. dianthi. After Holway. is destructive on Chrysanthemums in Japan.^"' P. iridis (D. C.) Duby, a hemi-pucci Stock Photo")
RMPG45YG–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 389 P. gentianae Strauss is a eu-puccinia on many species of cul- tivated gentians. P. gladioli Cast occurs on gladiolus. P. gran- ulans Kale. & Cke. is on cultivated Pelargoniums in France;-™ P. tulipae Schr. on tulips; P. scillae Lk. on Scilla; P. schroeteri Pass, on Narcissus in Europe. P. pazschkei Diet, is a lepto- puccinia on cultivated saxifrages in Europe. P. horiana Hen.. p. dianthi. After Holway. is destructive on Chrysanthemums in Japan.^"' P. iridis (D. C.) Duby, a hemi-pucci
RMRE38EJ–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. CHAPTEK I LIPE-HISTORF OF PUCCINIA CARIOIS, THE NETTLE AND SEDGE RUST Puccinia Garicis has two of its stages, the spermogonial and secidial, on the Nettle (Urtica dioica and other species), and two others, the uredo- and teleutospore-stages, on various species of Curex, especially C. paludesa. The first appearance on the nettle is in the spring, about the end of April or the beginning of May, when small swollen yellowish spots can be seen on the upper surface of the nettle-leaves. These spots are round and conv
RMPG415W–. The essentials of botany. Botany. 170 BOTANY. parasite, and at length burst through the epidermis (Fig. 94, A and I). The oonidia quickly drop out and are car-. FiG. 94.—Wheat-nist (Puccinia graminis). I, a cross-section of a Barberry- leaf through a mass of Cluster-cups; a, a, a, cups opened and slieddingr their conidia; p, and A, above, cu^s not yet opened; sp, sp, spermogones which pro- duce spermatia, whose function is not Icnown. ii, three Red-rust spores, ttr, on stalks: t, a Black-rust spore. 7/J, a mass of Black-rust spores bursting through the epidermis, e, of a leaf. All highly mag
RMRE37H4–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 188 PUCCINIA The secidium of P. Conopodii-Bistortae (q.v.) is sometimes to be found on the same plant as the teleiito-sori of P. tumida, though it is much rarer. Plowright mentions that, though the Pucoinia is very common round King's Lynn, he could never find the seoidium which he at that time wrongly supposed to be connected with it. See also Puccinia Biilhocastami. Distribution : France, Germany, Norway. 60. Puccinia PimpinellaB Mart. JScidmm Pimpimllae Kirohn. (1856) ; Cooke, Micr. Fung. p. 196. JS. Bunii D
RMPG450W–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 203 Phalaris arnudituicea; (3) f. sp. agroslis on Agrostis mdgaris and A, stolonifera. Yellow Rust of Wheat, Puccinia glumarum, without any known aecial stage. It has according to Eriksson the following specialized forms: (1) f. sp. tritici on wheat; (2) f. sp. secalis on rye; (3) f. sp. hordei on barley; (4) f. sp. Elymi on dymus arenarius; (5) f. sp. agropyri on couch grass, Agropyron repens.. Fig. 72.—Hollyhock rust. Puccinia mals/acearum. {Nantucket, August 19, 1915.) Bro
RMRE379C–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. ON THESIUM 229 ^cidia on Geranium pusillum, and possibly also on G. iriolle, G. rotundifolium; uredo- and teleutospores on Polygonum Con- volvulus, August and September. Uncommon. (Fig. 176.) The connection of the Eeoidium on the first-named host and the Puccinia on Pol. Convolvulus has been experimentally demonstrated by Tranzschel. It is possible that the same parasite also attacks P. dume- torum, P. Persioaria and others. The secidium is not known for certain to have occurred in Britain. The teleuto-sori of
RMRDWCX6–. Botany, with agricultural applications. Botany. BLACK RUST OF GRAIN (PUCCINIA GRAMINIS) 397. Rye, and Barley, and occurs on other Grasses. The presence of the mycelium in the host is first known through the appearance of reddish spots or lines on the stems and leaves in late spring or early sum- mer. The reddish spots or lines are regions of spore production. They are pustules or blister- like structures caused by masses of spore-bearing hyphae which push up the epidermis until it is finally ruptured {Fig. 353). The reddish color of the pustules is due to the reddish color of the spores. The
RMRDHT27–. Fungi; their nature and uses. Fungi. Fig. 58.— Pseudospores of Thecaphora hyalina. Fio. 59.—Pseudospores of Puccinia. Fig. 60.—Pseudospores of Triphragmium. In the Puccinicsi the distinctive features of the genera are based upon the more or less complex nature of the pseudospores, which. Fio. 61.—Pseudospores of Phragmidium bulbosum. Fig. 62.—Melampsora salicina. (Winter fruit.) are bilocular in Puccinia, trilocular in Triphragmium, multilocular in Phragmidium, &c. In the curious genus Podisoma the septate. Please note that these images are extracted from scanned page images that may hav
RMRDWCWK–. Botany, with agricultural applications. Botany. BLACK RUST OF GRAIN (PUCCINIA GRAMINIS) 399. Fig. 356. — Stage of the Wheat Rust on the Barberry bush, Berberis wlgaris. Left, leaf of Barberry, showing the affected areas which are red- dish, much thickened, and contain many cup-like depressions; right, a very much enlarged section through the affected area of the leaf, showing one of the cvips (c) with chains of aeciospores (X 200). The very small spores at (p) are the pycniospores.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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