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RF2DM18AX–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 377 Cedar apples of red cedar (Gymnosporangium macropus Link, and G. glohosiLw, Fart.). See Leaf Rust of Apples. Diseases of Orchards and Vineyards. The powdery mildew of lilac [Microsphcera alni {Walk.) IVint.]. This is the very common blight of lilacs which, in the fall, covers lilac leaves with a conspicuous white mycelial coating. The same blight is apparently found on many other plants, as alder, birches, high bush cranberry and others. Summer spores are produced in the usual manner for powdery mildews and the. Fig. 202 Stock Photo](https://c8.alamy.com/comp/RDD8T7/minnesota-plant-diseases-plant-diseases-minnesota-plant-diseases-377-cedar-apples-of-red-cedar-gymnosporangium-macropus-link-and-g-glohosilw-fart-see-leaf-rust-of-apples-diseases-of-orchards-and-vineyards-the-powdery-mildew-of-lilac-microsphcera-alni-walk-ivint-this-is-the-very-common-blight-of-lilacs-which-in-the-fall-covers-lilac-leaves-with-a-conspicuous-white-mycelial-coating-the-same-blight-is-apparently-found-on-many-other-plants-as-alder-birches-high-bush-cranberry-and-others-summer-spores-are-produced-in-the-usual-manner-for-powdery-mildews-and-the-fig-202-RDD8T7.jpg ". Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 377 Cedar apples of red cedar (Gymnosporangium macropus Link, and G. glohosiLw, Fart.). See Leaf Rust of Apples. Diseases of Orchards and Vineyards. The powdery mildew of lilac [Microsphcera alni {Walk.) IVint.]. This is the very common blight of lilacs which, in the fall, covers lilac leaves with a conspicuous white mycelial coating. The same blight is apparently found on many other plants, as alder, birches, high bush cranberry and others. Summer spores are produced in the usual manner for powdery mildews and the. Fig. 202 Stock Photo")
RMRDD8T7–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 377 Cedar apples of red cedar (Gymnosporangium macropus Link, and G. glohosiLw, Fart.). See Leaf Rust of Apples. Diseases of Orchards and Vineyards. The powdery mildew of lilac [Microsphcera alni {Walk.) IVint.]. This is the very common blight of lilacs which, in the fall, covers lilac leaves with a conspicuous white mycelial coating. The same blight is apparently found on many other plants, as alder, birches, high bush cranberry and others. Summer spores are produced in the usual manner for powdery mildews and the. Fig. 202
RF2DM3H84–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRDFE10–. Manual of tree diseases . Trees. JUNIPER DISEASES 197. Fig. 31. — Cedar-appUs, early- stages of development. Cedae-Apples Caused by Gymnosporangium juniperi-virginiance Schw. and G. glbbosum Farlow The two diseases of the red juniper known as cedar-apples or cedar-flowers are similar in nature and are found commonly in ea,stern and central United States. The first pathogene mentioned above has its alternate stage on the culti- vated apple and. other species of Malus, while the latter pathogene occurs on various species of haw, mountain ash and the cultivated apple, and pear. The junipers are
RF2DM1MDE–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Diseases of economic plants . Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190.- - Longitudinal section of cedar showing effect of Polyponts juniperinus. After von Schrenk. White rot {Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite Stock Photo](https://c8.alamy.com/comp/RDE2GM/diseases-of-economic-plants-plant-diseases-trees-and-timber-435-cedar-red-rust-gymnosporangium-various-speciesthe-quotcedar-applesquot-familiar-upon-the-red-cedar-are-usually-of-but-small-significance-to-the-cedar-tree-itself-unless-exception-ally-abundant-see-apple-rust-fig-190-longitudinal-section-of-cedar-showing-effect-of-polyponts-juniperinus-after-von-schrenk-white-rot-polyporus-juniperinus-v-schrenk-in-this-disease-long-holes-appear-in-the-heartwood-extend-ing-longitudinally-with-a-partition-of-sound-wood-be-tween-these-cavities-may-eventually-unite-RDE2GM.jpg ". Diseases of economic plants . Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190.- - Longitudinal section of cedar showing effect of Polyponts juniperinus. After von Schrenk. White rot {Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite Stock Photo")
RMRDE2GM–. Diseases of economic plants . Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190.- - Longitudinal section of cedar showing effect of Polyponts juniperinus. After von Schrenk. White rot {Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite
RF2DM2P0K–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Botany all the year round; a practical text-book for schools. Botany. 284 FUNGI rust is known to be capable of propagating year after year in the uredo stage alone.^ the spores surviving through the winter on volunteer grains and other grasses. 406. Cedar Apples.—An excellent subject for study is the common fungus {Gymnosporangiunt) that produces upon red cedar twigs the large excrescences familiarly known as " cedar apples." It is related to the wheat rusts, but has only two phases, its spores germinating and pro-. 543. — Two species of " cedar apple " (Gymnosporangium') Stock Photo](https://c8.alamy.com/comp/RE0RY5/botany-all-the-year-round-a-practical-text-book-for-schools-botany-284-fungi-rust-is-known-to-be-capable-of-propagating-year-after-year-in-the-uredo-stage-alone-the-spores-surviving-through-the-winter-on-volunteer-grains-and-other-grasses-406-cedar-applesan-excellent-subject-for-study-is-the-common-fungus-gymnosporangiunt-that-produces-upon-red-cedar-twigs-the-large-excrescences-familiarly-known-as-quot-cedar-applesquot-it-is-related-to-the-wheat-rusts-but-has-only-two-phases-its-spores-germinating-and-pro-543-two-species-of-quot-cedar-apple-quot-gymnosporangium-RE0RY5.jpg ". Botany all the year round; a practical text-book for schools. Botany. 284 FUNGI rust is known to be capable of propagating year after year in the uredo stage alone.^ the spores surviving through the winter on volunteer grains and other grasses. 406. Cedar Apples.—An excellent subject for study is the common fungus {Gymnosporangiunt) that produces upon red cedar twigs the large excrescences familiarly known as " cedar apples." It is related to the wheat rusts, but has only two phases, its spores germinating and pro-. 543. — Two species of " cedar apple " (Gymnosporangium') Stock Photo")
RMRE0RY5–. Botany all the year round; a practical text-book for schools. Botany. 284 FUNGI rust is known to be capable of propagating year after year in the uredo stage alone.^ the spores surviving through the winter on volunteer grains and other grasses. 406. Cedar Apples.—An excellent subject for study is the common fungus {Gymnosporangiunt) that produces upon red cedar twigs the large excrescences familiarly known as " cedar apples." It is related to the wheat rusts, but has only two phases, its spores germinating and pro-. 543. — Two species of " cedar apple " (Gymnosporangium')
RF2DM3E4G–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 57 though some weak points in the plant organization may be re- sponsible for the successful attack of the parasite, as has been experimentally proven within the last year. In other words, the most successful parasitic fungi are those which can stimulate the affected parts of host plants to extraordinary effort, or at least do not immediately injure those parts.. Fig. 26.—"Birds-nest" witches'-broom on red cedar caused by the birds-nest rust fungus (Gymnosporangium nidus-avis). The bush-like broom stands vertical o Stock Photo](https://c8.alamy.com/comp/RDE4NY/minnesota-plant-diseases-plant-diseases-minnesota-plant-diseases-57-though-some-weak-points-in-the-plant-organization-may-be-re-sponsible-for-the-successful-attack-of-the-parasite-as-has-been-experimentally-proven-within-the-last-year-in-other-words-the-most-successful-parasitic-fungi-are-those-which-can-stimulate-the-affected-parts-of-host-plants-to-extraordinary-effort-or-at-least-do-not-immediately-injure-those-parts-fig-26quotbirds-nestquot-witches-broom-on-red-cedar-caused-by-the-birds-nest-rust-fungus-gymnosporangium-nidus-avis-the-bush-like-broom-stands-vertical-o-RDE4NY.jpg ". Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 57 though some weak points in the plant organization may be re- sponsible for the successful attack of the parasite, as has been experimentally proven within the last year. In other words, the most successful parasitic fungi are those which can stimulate the affected parts of host plants to extraordinary effort, or at least do not immediately injure those parts.. Fig. 26.—"Birds-nest" witches'-broom on red cedar caused by the birds-nest rust fungus (Gymnosporangium nidus-avis). The bush-like broom stands vertical o Stock Photo")
RMRDE4NY–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 57 though some weak points in the plant organization may be re- sponsible for the successful attack of the parasite, as has been experimentally proven within the last year. In other words, the most successful parasitic fungi are those which can stimulate the affected parts of host plants to extraordinary effort, or at least do not immediately injure those parts.. Fig. 26.—"Birds-nest" witches'-broom on red cedar caused by the birds-nest rust fungus (Gymnosporangium nidus-avis). The bush-like broom stands vertical o
RMRH0W40–. Bulletin. Agriculture. 16 N. H. AGR. EXPERIMENT STATION. [Bulletin 157 APPLE RUST. Gymnosporangium spp. Apple rust is a widely distributed disease^ and in some sections is quite injurious. It is of common occurrence in New Hamp- shire and, while not one of the most serious apple troubles, it often does con- siderable damage. It some- times attacks the fruit, but its effects are usually con- fined to the foliage. Here it causes yellowish spots (Fig. 18) which usually become somewhat elevated in the center and in which are pro- duced numerous spores. The spots usually appear on the leaves in J
RMRDFE0X–. Manual of tree diseases . Trees. Fig. 31. — Cedar-appUs, early- stages of development. Cedae-Apples Caused by Gymnosporangium juniperi-virginiance Schw. and G. glbbosum Farlow The two diseases of the red juniper known as cedar-apples or cedar-flowers are similar in nature and are found commonly in ea,stern and central United States. The first pathogene mentioned above has its alternate stage on the culti- vated apple and. other species of Malus, while the latter pathogene occurs on various species of haw, mountain ash and the cultivated apple, and pear. The junipers are often covered with hu
RMRDD70X–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 397 the species already described in remaining closed at the apex, the spores escaping through trellis-like slits on the lateral walls of the peridia (Fig. 234). This fungus will not germinate on apple-trees, but on pears every leaf may be thickly covered with aecidia and pycnidia, and considerable damage to the crop thereby ensue (Fig. 233)... Pig. 231.—Longitudinal section through a conical teleut
RMRDD71X–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a born (Fig. 219). A similar case is described by Barclay^ in wbich the peridia of aecidia on Rhamnus dahurica were very long if produced in dry weather, but short if in moist weather.^ The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the spurs or branch
RMRDE2A9–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. RUST FUNGI 209 CACE^) while the three-, four or five-celled teliospores are found on CuPRESSiNEiE (ChamcBcyparts, Cupressus, Juniperus, Libocedrus). One autcecious species is G. bermudianum which produces both its aecia and teliaon junipers (7. bermudianum). Kern gives thirty-two species as the number for North America and in vol. 7, North American Flora, part 3, pages 188-190, gives a useful key for the identification of the species. Gymnosporangium botryapites causes fusiform swelling
RMRE1R0P–. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 257 spring, variously shaped masses of hyphae bearing numerous teliospores radiate out from these galls and in the early spring rains these strands swell up, forming conspicuous yellow, jelly- like masses. The basidiospores are developed in the jelly and infest the leaves of the apple, thorn, shadbush, etc. In some of the genera of rusts all the stages appear upon the same plant as in the May apple and jack-in-the-pulpit. In the early spring. Fig. 165. A rust, Gymnosporangium, that infests the juniper and mem- bers of the apple
RMRH2T2F–. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 309 ^cidiospores. ^cidia hypophyllous, on the same spots, flask shaped, 1—2 mm. broad, pale-brown, split to the base into laeinia^ which remain united at the summit, and at first are joined at intervals by short transverse bands; spores finely verru- culose, brown, 28—30 jjl (average). Teleutosimres. Spore-masses on the branches, at first pulvinate, dark- brown, then irregularly conical, 8— 10mm. high, red-brown, gelatinous; spores of two kinds, thick-walled and thin-walled, broadly and obtusely
RMRDX0G6–. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. 212 PROTOBASIDIOMYCETES [CH. â â¢:⢠:â m Fig. i88. Uromyces Poae Raben.; conjut^nte divi<;ions in aecidium, x 1330; after Blacliman and Fraser. fication and in some cases it shows but few of the characters of normal mitosis. In the spermatial hyphae of Gymnosporangium clavariaeforme, for example, Blackman has described a condensation of the nucleus to form a deeply staining body out of which the nucleolus is squeezed. The chromatin is drawn apart into two apparently homogeneous masses between which a kinoplasmic thread represents the
RMRDC14W–. Botany for agricultural students . Botany. CEDAR APPLES AND APPLE RUST (GYMNOSPORANGIUM) 401 . hope, however, seems to be in breeding and selecting ymeties of grains which can resist the attack of the Rust, and ^roie progress has already been made in this direction. j^ Cedar Apples and Apple Rust (Gymnosj&il^giuin).i â There are several Rusts belonging'to this group, 4)r^the one producing Cedar Apples and the Rust /^ on Apple trees is the most common and the most im- portant of the group. It is common in nearly every region where Red Ceda«^ grow, but does most dam^e to fruit trees in th
RMRDED2T–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 389 fissure-like pores in place of bordered pits. The wood-elements in cross-section are no longer round but polygonal; the bast becomes very irregular, parenchyma grows rapidly, bast fibres remain thin-walled and have no longer a straight course. The mycelium fills the bast and rind, forming masses in the inter- cellular spaces; it is easiest found in the tangential section. On the fall of the club
RMREF646–. Comparative morphology of Fungi. Fungi. Fig. 371.—1. Gymnosporangium clavariaeforme. Section of a pycnium on leaf of Crataegus ( X 345). 2. Phragmidium violaceum. Pycnium on Rubus with ruptured cuticle (X440). 3. Cronartium ribicola portion of pycnium (X 1,160). P, paraphyses; Ep, epidermis; C, cuticle. (After Blackman, 1904, and Colley, 1918.) by a septum and which then falls off. The other remains behind in the basal cell and divides repeatedly, forming many successive spores. The periphery of the whole sorus is surrounded by a ring of periphyses (in systematic works often called paraphyse
RMRE36Y5–. The British rust fungi (Uredinales) their biology and classification. Rust fungi. GYMNOSPORANGIUM 305 JEcidiospores. iEcidia clustered on yellow or orange thick- ened spots on the leaves, fruits, and stems, cylindrical, up to. Fig. 230. G. clavariaeforme, .^cidia (Eoeatelia) on leaf, fruit and branch of Hawthorn (reduced); a, peridium x 16. The fruit and gall on branch are shown as tliey appear when the peridia are old and the mass looks some- what like a honey-comb. 2| mm. high, fimbriate above, at length lacerate to base, pale- brown ; spores verruculose, brownish, about 28—30 fi; pores 8—
RMRDE2A2–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 2IO MYCOLOGY scattered, or aggregated and its aecia on seven species of Amelanchier, one each of Aronia and Cydonia. Gymnosporangium Ellisii (Figs. 74 and 75) in its telial form distorts the younger branches of the white cedar, Chamacyparis thyoides, pro-. FiG. 80.—RoesteUa, or fficia on apple leaf. (After Giddings and Berg, Bull 257 Agric. Exper. Stat. Univ. Wise, July, 1915.) ducing numerous fasciations. The «cia and pycnia of this fungus are on Myrica. Gymnosporangium globosum is rem
RMRDCX6T–. Manual of fruit diseases . Fruit. PEAR DISEASES 345 Pacific Coast Rust Caused by Gymnosporangium Libocedri (P. Henn.) Kern = G. Blas- daleanum (Diet, and Hohv.) Kern This is one of the recently recognized rusts of the pear family. The name Pacific Coast rust is used in contradistinction to eastern rust of pear (see page 341). The disease here consid- ered was discovered in Oregon on cultivated pear several years ago, but was first given special attention in 1907. Since that date it has been found annually in Oregon and was par- ticularly abundant in 1913. It is believed on good authority tha
RMRDFE3G–. Manual of tree diseases . Trees. CEDAR DISEASES 131 by a ground fire. The same disease affects similarly spruce, fir, juniper, arbor-vitse and hemlock. It is described under spruce diseases, on page 317.. Fig. 16. — Brown felt-blight on inceusa cedar. Eastern Witches'-Bkoom Caused by Gymnosporangium myricaium (Schw.) Fromme Witches'-brooms are found on white cedar along the At- lantic Coast from Massachusetts to Delaware and in northern Florida and southern Alabama. The witches'-broom and branch-swelling diseases, both caused by similar rust-fungi,. Please note that these images are extracte
RMRH2T4J–. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 305 zEcidiospores. ^-Ecidia clustered on yellow or orange thick- ened spots on the leaves, fruits, and stems, cylindrical, up to. Fig. 230. G. clavariaeforme. ^Ecidia (Rrestelia) ou leaf, fruit and branch of Hawthorn (reduced) ; a, peridium x 16. The fruit and gall on branch are shown as they appear when the peridia are old and the mass looks some- what like a honey-comb. 2^ mm. high, fimbriate above, at length lacerate to base, brown ; spores verruculose, brownish, about 28—30 fi; 8—-10, scatte
RMRDCX3D–. Manual of fruit diseases . Fruit. Fig. 114. — Quince-rust. Fig. 115.— Rust on quince- twig. at the stem end, others at the calyx-end. Again the whole fruit is involved and it may fall. More often, however, it hangs to the tree, dies, and becomes black and hard. There is usually considerable distortion. Twig-infections (Fig. 115) are commonly found at the base of new shoots, and knots are produced which resemble black- knot of plums. Cause. The quince-rust fungus, Gymnosporangium clampes, has a peculiar life-history. A part of its cycle is spent on the quince. Please note that these images ar
RMRDD721–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. ilh Fig. 217.—Section through a swelling on a sixteen-year twig of J Juniper attacked by Gymnosporangium in its eighth year; three conical spore-cushions !u*e Indicated, also a cushion-scar with the scar-tissue. (After Woemle.). Fig. 21S.—Longitudinal section of a spore-cashion of Gymnospoitingium da' vai-ia^'orme. Somewhat diagrammatic (After Woemle.) and during rain swell up into long club-shaped sporophores, cont
RMRDE2C0–. 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
![. The British rust fungi (Uredinales), their biology and classification. Uredineae. 308 GYMNOSPORANGIUM j^cidiuspores. yEcidia hypophylloiis, in irregular or circular groups, horn-shaped, conical, curved, ^ mm. wide, 2 mm. long, at length open and fimbriate above, yellowish- brown, on round spots which are brownish below, and bright-orange or red on the upper side; spores finely verruculose, brown, 21â28x19â24/z; ^^P.- 233. G Juniperi germ-pores 8â10, scattered. Groups 01 fficidia on leaflet " 'â of Mountain Ash x li; Teleutospoves. Spore-masses on a, an unopened peridium , ⢠n â n â , , Stock Photo](https://c8.alamy.com/comp/RH2T2Y/the-british-rust-fungi-uredinales-their-biology-and-classification-uredineae-308-gymnosporangium-jcidiuspores-yecidia-hypophylloiis-in-irregular-or-circular-groups-horn-shaped-conical-curved-mm-wide-2-mm-long-at-length-open-and-fimbriate-above-yellowish-brown-on-round-spots-which-are-brownish-below-and-bright-orange-or-red-on-the-upper-side-spores-finely-verruculose-brown-2128x1924z-p-233-g-juniperi-germ-pores-810-scattered-groups-01-fficidia-on-leaflet-quot-of-mountain-ash-x-li-teleutospoves-spore-masses-on-a-an-unopened-peridium-n-n-RH2T2Y.jpg ". The British rust fungi (Uredinales), their biology and classification. Uredineae. 308 GYMNOSPORANGIUM j^cidiuspores. yEcidia hypophylloiis, in irregular or circular groups, horn-shaped, conical, curved, ^ mm. wide, 2 mm. long, at length open and fimbriate above, yellowish- brown, on round spots which are brownish below, and bright-orange or red on the upper side; spores finely verruculose, brown, 21â28x19â24/z; ^^P.- 233. G Juniperi germ-pores 8â10, scattered. Groups 01 fficidia on leaflet " 'â of Mountain Ash x li; Teleutospoves. Spore-masses on a, an unopened peridium , ⢠n â n â , , Stock Photo")
RMRH2T2Y–. The British rust fungi (Uredinales), their biology and classification. Uredineae. 308 GYMNOSPORANGIUM j^cidiuspores. yEcidia hypophylloiis, in irregular or circular groups, horn-shaped, conical, curved, ^ mm. wide, 2 mm. long, at length open and fimbriate above, yellowish- brown, on round spots which are brownish below, and bright-orange or red on the upper side; spores finely verruculose, brown, 21â28x19â24/z; ^^P.- 233. G Juniperi germ-pores 8â10, scattered. Groups 01 fficidia on leaflet " 'â of Mountain Ash x li; Teleutospoves. Spore-masses on a, an unopened peridium , ⢠n â n â , ,
RMRMAR2D–. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). Fig. 137. Cecidomyia sp. on Crataegus, 32727. (Original) Irregular twig swelling, resembling black knot of plum but with bright red spores, length 1-2 cm, on C. o x y c a n t h a. Fungus. Cedar rust, Gymnosporangium globosum. 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.. New York State Museum; Univ
RMREF5T3–. Comparative morphology of Fungi. Fungi. Fig. 387.—1. Botryorhiza Hippocrateae, section of mature and young telium. 2. Uromyces striatus; 3. Puccinia graminis. (1 X 330; 2, 3 X 300; 1 after Olive, 1918; 2, 3, after Sappin-Trouffy, 1896.) and whose spores, thick walled and yellow brown, falling easily from the stipe, can germinate only after a winter's rest (forma fragilipes). In Gymnosporangium the number of daughter cells is generally two; in Phragmidium (Fig. 388, 1 to 4), it may reach twelve. In both genera,. Please note that these images are extracted from scanned page images that may hav
RMRH1XCA–. Bulletin. Mycology; Fungi; Fungi. BUi,L DE LA SOC, MIG. DE FRANCE. 94 -^f^f.ij 23 Lf ^'^^ ?/ 27 25 OP 33 â â 4 ./ 30 31 ^ 32 > '.J / G. de KYCmiiS (i-3). HETEROBASÃDION ^ï-l ^.LUiOî.NfA (11-15). GYMNOSPORÃNGiUM(16-i7). LEPTOLEGNIA (18) PYTHiOPSIS (19-2()i APLANES (21-22). HYMENOGONmiUM (23-S6)-, PÃSTEURIA (?7.32^,. 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.. Société mycologique de France; Société botanique d
![. The Botanical magazine. Plants; Plants -- Japan. FEB. 190SJ YAMADA AND MFVA KE.—G YMNOSPORANGFUM. 23 gekommen ist. Daher haben sich beide entschlossen, die Arbeit gemeinschaftlich zu verofifentlichen und nannten zu Ehren des Herrn Prof. Miyabe den Pilz " Gymnosporangium Miya,bei Yamada et MiYAKE sp. nov." Teleutosporenlager. Der Pilz bildet gewohnlich sein Lager mit clem perennieren^ den Mycel aiif den Aesten und Stammen von C. pisifera, C. p, var. pulmosa imd C. p. var. squarrosa, selten auf den Nadelti dieser Holzart. (Wahrscheinlich ist dies das erste Stadium des Parasites.) Das Stock Photo](https://c8.alamy.com/comp/RHB1B4/the-botanical-magazine-plants-plants-japan-feb-190sj-yamada-and-mfva-keg-ymnosporangfum-23-gekommen-ist-daher-haben-sich-beide-entschlossen-die-arbeit-gemeinschaftlich-zu-verofifentlichen-und-nannten-zu-ehren-des-herrn-prof-miyabe-den-pilz-quot-gymnosporangium-miyabei-yamada-et-miyake-sp-novquot-teleutosporenlager-der-pilz-bildet-gewohnlich-sein-lager-mit-clem-perennieren-den-mycel-aiif-den-aesten-und-stammen-von-c-pisifera-c-p-var-pulmosa-imd-c-p-var-squarrosa-selten-auf-den-nadelti-dieser-holzart-wahrscheinlich-ist-dies-das-erste-stadium-des-parasites-das-RHB1B4.jpg ". The Botanical magazine. Plants; Plants -- Japan. FEB. 190SJ YAMADA AND MFVA KE.—G YMNOSPORANGFUM. 23 gekommen ist. Daher haben sich beide entschlossen, die Arbeit gemeinschaftlich zu verofifentlichen und nannten zu Ehren des Herrn Prof. Miyabe den Pilz " Gymnosporangium Miya,bei Yamada et MiYAKE sp. nov." Teleutosporenlager. Der Pilz bildet gewohnlich sein Lager mit clem perennieren^ den Mycel aiif den Aesten und Stammen von C. pisifera, C. p, var. pulmosa imd C. p. var. squarrosa, selten auf den Nadelti dieser Holzart. (Wahrscheinlich ist dies das erste Stadium des Parasites.) Das Stock Photo")
RMRHB1B4–. The Botanical magazine. Plants; Plants -- Japan. FEB. 190SJ YAMADA AND MFVA KE.—G YMNOSPORANGFUM. 23 gekommen ist. Daher haben sich beide entschlossen, die Arbeit gemeinschaftlich zu verofifentlichen und nannten zu Ehren des Herrn Prof. Miyabe den Pilz " Gymnosporangium Miya,bei Yamada et MiYAKE sp. nov." Teleutosporenlager. Der Pilz bildet gewohnlich sein Lager mit clem perennieren^ den Mycel aiif den Aesten und Stammen von C. pisifera, C. p, var. pulmosa imd C. p. var. squarrosa, selten auf den Nadelti dieser Holzart. (Wahrscheinlich ist dies das erste Stadium des Parasites.) Das
RMRHTDHR–. Bidrag till kännedom av Finlands natur och folk. Science. 16. innanför liggande, ännu icke fullt utbildade sporsam- lingarna eller < sporerna <. Hvarje hyfkrans med sina innanför varande element är en enkel sporhop. Då dessa ofta äro ytterst små, kallas de mikrohopar. Flera mikrohopar äro vanligen tätt packade intill hvar- andra och bilda då en sammansatt sporhop. Hos släktet Gymnosporangium bil- das teleutosporerna som hos Puccinia, men med den skillnad, att sporernas skaft äro sjmnerligen långa och i vat- ten starkt uppsvällande, så att spor- hoparna få utseende af stora, rödgula, ge
RMRMAR32–. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). 136 NEW YORK STATE MUSEUM Irregularly oval, frequently fissured twig gall, length 3 to 4 cm, diameter 2.5 cm. Felt and Joutel '04, p. 62 Coleop. Thorn limb borer, Saperda fayi Bland.. Fig. 137. Cecidomyia sp. on Crataegus, 32727. (Original) Irregular twig swelling, resembling black knot of plum but with bright red spores, length 1-2 cm, on C. o x y c a n t h a. Fungus. Cedar rust, Gymnosporangium globosum. Please note that these images are extracted from scanned page im
RMRMWB7T–. Annales des sciences naturelles. Plants; Biology. SUR LES MYCOCECIDIES DES GYMNOSPORANGIUM 319 parois minces, bordées à leur extérieur par une assise de cellules à parois également minces mais subéréfiées, qui forment comme une gaine protectrice au canal sécréteur. La subérification se fait d'une façon irrégulière dans le cours de la première année; elle envahit parfois les cellules hypo- dermiques adjacentes (qui toujours dans ce cas ont des parois minces ). Dans d'autres cas elle manque sur une étendue plus oumoins grande. La seconde année, lasubérification s'accentue, elle envahit tous le
RMRJMDF7–. bao zi zhi wu xing tai xue. Botany. 158 第äºç·¨èç±»æ¤ç© è¨å¤§ï¼æ1个åå½¢æ±å-ï¼è¿å°±æ¯æ-è¢å-ï¼å¾113.0)ãæ å-¢å-ä¸é¨çç´°ææ¯ä¸ªj^ãå¨åä¸æ å-æå è²çæ è¢å-ï¼å ¶åæ°æ¯ï¼+)æ§,åæ°æ¯ï¼-ï¼æ§ãæ å-¢å-ééå°æªä¸è½èåã'iiåæ¶ï¼ä¸éå¼æ§ç åæå¹³ï¼I^fåèåæ ¸çèçµ²ï¼å¾113.iV)ï¼èåçæ§å-¢å-å¨ãéå¼æ§çååè²é¹è¢å-å¨ãæ-¤è çèçµ²ï¼æ è«ä½ç§é½æå¸å¨ï¼ä¼¸å ¥å¯ççç´°è以å¸æ¶å »æã >çé¿ç¯å¢æ-¤ç ä¸çåå°é½æï¼æå½ä¹å¤ï¼å°éº¦ãéèä¸å¸¸æåç¾ãåæ¹ä¿åå«é»èç çå°± æ¯è¿ç§ç ã ⢠f^^M (Gymnosporangium) ç å¾è¹émQGymnosporangium ^wadcte)å¯çäºè¹æç±»å檢æ 两ç§å¯ä¸»ä¹ä¸ãè¹æç ^ ' ' å¶çãæå®ä¸æ¼±å®¤é½å¯è¢«å¯çèåçæ§ çæ´»å²è¹æé¹ç èçæ é ä¸å°éº¦æé¹èç¸åï¼æå·®å¼çæ¯ä¸
RMRCC2W9–. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. CRONARTILM. 383 and curl up. In some districts very conanon. Aecidial stage unknown. Gymnosporangium.' Teleutospores bicrllular and furnished with stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.- The first-formed teleutospores are thick-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
RMRCC3PC–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 399 of the spot in question is either completely destroyed or trans- formed into irregular cells, separated by intercellular spaces. The anatomical changes in swellings (Fig. 235) induced by G. sabinae on' Junipenis Sdbina were investigated by Woernle with the following results. Wood, bast, and rind are increased round the whole circumference of the stem. Along with the broadening of the year-rings, h
RMRCC3PW–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 395 The strikingly characteristic cleavage of the wood by the overgrown elements of the medullary rays and the wood- parenchyma, in the case of the twig-inhabiting form, will be seen from the figures (Fig. 229). As already noticed, the sporogenous cushions are generally formed on one side. After. Please note that these images are extracted from scanned page images that may have been digitally enhanced
RMRCFD1G–. Die wirtswechselnden rostpilze; versuch einer gesamtdarstellung ihrer biologischen verhältnisse. Rust fungi. Taf. IV. Wirtswechselnde Gymnosporangium-Arten. Cydonia vulgaris. Gymno- sporangium tremelloides Juniperus juniperimim communis clavariaeforme japonieum chinensis elavipes glolosiim virginiana tnacropus Nidiis avis Nelsoni scopulorum Salinae Sahina confusiim hiseptalum Chamaecyparis sphaeroidea Cupressus Cunni.gharmanurn ^^^^^^^^^ Hauptnähi-pflanzen Nebennährpflanzen Bei Versuchen wurden nur Spermogonien er- halten, oder Zusammenhang noch nicht sicher festgestellt.. Please note that t
RMRCC2TH–. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. GYMNOSPORANGIUM. 399 of the spot in question is either completely destroyed or tiaus- formed into irregular cells, separated by intercellular spaces. The anatomical changes in swellings (Fig. 235) induced by (t. sdhinae on JunijHrus Sahina were investigated by Woernle with the following results. Wood, bust, and rind are increased round the whole circumference of the stem. Along with the broaden
RMRCD8Y2–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. GYMNOSPORANGIUM 315 chains. Closely allied to Phragmidhtm, differing mainly in the relatively greater number of cells forming the teleuto- spore. Both stages grow on the same host-plant. Burnet leaf spot {Xenodochus carbonarius, Schlecht.) is parasitic on this plant. The aecidium stage forms large, orange-red, roundish patches on the leaves, and elongated patches on the stems. This is followed by the black, wart- like pustules of the teleutospore stage o
RMRCC3RJ–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 384 UREDINKAK. spores grow on needles and twigs of Coniferae, the aecidia on the leaves of various Eosaceae (Pomaceae). Five species occur in (rerniany, but there are many in America. Gymnosporangium clavariaefonne Jacquin. (Britain and U.S. Anu'rica.) The mycelium of this species perennates in twigs of Junijyeriis communis. Infection is brought about by aecidiospores. In the following year a swelling of attacked plac
RMRCC3DW–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 384 UREDINEAE. spores grow on needles and twigs of Coniterae, the aecidia on the leaves of various liosaceae (Pomaceae). Five species occur in Germany, but there are many in America. Gymnosporangium clavariaeforme Jacquin. (Britain and U.S. Anu-rica.) Tlie mycelium of this species perennates in twigs of Juniperus communis. Infection is brought about by aecidiospores. In the following year a swelling of attacked places
RMRCC3PH–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 397 the species already described in remaining closed at the apex, the spores escaping through trellis-like slits on the lateral walls of the peridia (Fig. 234). This fungus will not germinate on apple-trees, but on pears every leaf may be thickly covered with aecidia and pycnidia, and considerable damage to the crop thereby ensue (Fig. 233).. Please note that these images are extracted from scanned p
RMRCDPPN–. Diseases of economic plants. Plant diseases. 110 DISEASES OF ECONOMIC PLANTS Texas root rot. See cotton. Black mold (Alternaria sp.). — In addition to the ravages of this disease as upon the apple, the leaves and shoots are also attacked and the fruit injury is not limited to. Fig. 46. — Young quinces showing rust. After Bailey. the blossom end. The disease has been noted chiefly upon the Kieffer. For treatment, see apple. QUINCE Rust (Gymnosporangium clavipes C. & P.)- — The quince rust, spring stage, agrees with the apple rust in general characters. The causal fungus grows upon the fru
RMRCC3DR–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a horn (Fig. 219). A similar case is described by Barclay^ in which the peridia of aecidia on Rhamnus daliurica were very long if produced in dry weather, but short if in moist weather. ^ The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the spurs or branch
RMRCDP74–. Diseases of flowers and other ornamentals. Flowers; Plant diseases. 36 California Agricultural Extension Service [Cir. H8 large, hoof-shaped conks or fruiting bodies attached to the trunk at branch stubs or knotholes; the upper surface is light brown, the lower yellowish green. These are very short-lived, being quickly destroyed by insects. Witches' Broom, Rust.—In the native incense cedar, numerous large and small witches' brooms or masses of short branches are caused by a. Fig. 11.—Sclerotial fungus that causes root rot of iris. fungus, Gymnosporangium libocedri. Another or alternate stage
![. Die wirtwechselnden Rostpilze; Versuch einer Gesamtdarstellung ihrer biologischen Verhltnisse. Rust fungi. Taf. IV. "Wirtswechselnde Gymnosporangium-Arten. Cydonia vulgaris Pirus communis Pashia sinetisis Mahts coronaria Sorbus Chamaemespilus Aucuparia americana torminälis latifolia ^ Aria arbutifolia Mespilus germanica Crataegus coccinea glandulosa ^ Crus-galli tomentosa sanguinea (o Douglasü Oxyacantha monogyna tanacetif'olia 0 nigra Ãmelanchier canadensis vulgaris alnifolia ⢠Gymno- sporangium tremelloides juniperinum â -^à clavariaeforme japonicum. Nidtis avis Sabinae confusum bi Stock Photo](https://c8.alamy.com/comp/RCFD0J/die-wirtwechselnden-rostpilze-versuch-einer-gesamtdarstellung-ihrer-biologischen-verhltnisse-rust-fungi-taf-iv-quotwirtswechselnde-gymnosporangium-arten-cydonia-vulgaris-pirus-communis-pashia-sinetisis-mahts-coronaria-sorbus-chamaemespilus-aucuparia-americana-torminlis-latifolia-aria-arbutifolia-mespilus-germanica-crataegus-coccinea-glandulosa-crus-galli-tomentosa-sanguinea-o-douglas-oxyacantha-monogyna-tanacetifolia-0-nigra-melanchier-canadensis-vulgaris-alnifolia-gymno-sporangium-tremelloides-juniperinum-clavariaeforme-japonicum-nidtis-avis-sabinae-confusum-bi-RCFD0J.jpg ". Die wirtwechselnden Rostpilze; Versuch einer Gesamtdarstellung ihrer biologischen Verhltnisse. Rust fungi. Taf. IV. "Wirtswechselnde Gymnosporangium-Arten. Cydonia vulgaris Pirus communis Pashia sinetisis Mahts coronaria Sorbus Chamaemespilus Aucuparia americana torminälis latifolia ^ Aria arbutifolia Mespilus germanica Crataegus coccinea glandulosa ^ Crus-galli tomentosa sanguinea (o Douglasü Oxyacantha monogyna tanacetif'olia 0 nigra Ãmelanchier canadensis vulgaris alnifolia ⢠Gymno- sporangium tremelloides juniperinum â -^à clavariaeforme japonicum. Nidtis avis Sabinae confusum bi Stock Photo")
RMRCFD0J–. Die wirtwechselnden Rostpilze; Versuch einer Gesamtdarstellung ihrer biologischen Verhltnisse. Rust fungi. Taf. IV. "Wirtswechselnde Gymnosporangium-Arten. Cydonia vulgaris Pirus communis Pashia sinetisis Mahts coronaria Sorbus Chamaemespilus Aucuparia americana torminälis latifolia ^ Aria arbutifolia Mespilus germanica Crataegus coccinea glandulosa ^ Crus-galli tomentosa sanguinea (o Douglasü Oxyacantha monogyna tanacetif'olia 0 nigra Ãmelanchier canadensis vulgaris alnifolia ⢠Gymno- sporangium tremelloides juniperinum â -^à clavariaeforme japonicum. Nidtis avis Sabinae confusum bi
![. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CROXARTIUM. 383 and curl up. In some districts very common. Aecidial stage unknown. Gymnosporangium. ^ Teleutospores bicellular and furnished with .stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.- The first-formed teleutospores are thick- o. 1 ^ ^ ^ '^ 'i^ ''^o o ^'â "vf A 0=.s>.'^<i;;^ ^. Please note that these images are extracted from scanned page images th Stock Photo](https://c8.alamy.com/comp/RCC3RN/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-croxartium-383-and-curl-up-in-some-districts-very-common-aecidial-stage-unknown-gymnosporangium-teleutospores-bicellular-and-furnished-with-stalks-which-have-gelatinous-walls-so-that-the-spores-come-to-form-part-of-a-gelatinous-mass-the-first-formed-teleutospores-are-thick-o-1-i-o-o-quotvf-a-0=sgtlti-please-note-that-these-images-are-extracted-from-scanned-page-images-th-RCC3RN.jpg ". Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CROXARTIUM. 383 and curl up. In some districts very common. Aecidial stage unknown. Gymnosporangium. ^ Teleutospores bicellular and furnished with .stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.- The first-formed teleutospores are thick- o. 1 ^ ^ ^ '^ 'i^ ''^o o ^'â "vf A 0=.s>.'^<i;;^ ^. Please note that these images are extracted from scanned page images th Stock Photo")
RMRCC3RN–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CROXARTIUM. 383 and curl up. In some districts very common. Aecidial stage unknown. Gymnosporangium. ^ Teleutospores bicellular and furnished with .stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.- The first-formed teleutospores are thick- o. 1 ^ ^ ^ '^ 'i^ ''^o o ^'â "vf A 0=.s>.'^<i;;^ ^. Please note that these images are extracted from scanned page images th
RMRCC2W8–. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 384 UREDIXEAE. spores grow on needles and twigs of Coniterae, the aecidia on the leaves of various Eosaceae (Poraaceae). Five species occur in Germany, hut there are many in America. Gymnosporangium clavariaeforme Jacquin. (Britain and U.S. America.) Tlie mycelium of this species perennates in twigs of Jimiperiis communis. Infection is brought about by aecidiospores. In the following year a swe
RMRCC3DF–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 395 , The strikingly characteristic cleavage of the wood by the overgrown elements of the medullary rays and the wood- parenchyma, in the case of the twig-inhabiting form, will be seen from the figures (Fig. 229). As already noticed, the sporogenous cushions are generally formed on one side. After. Fig. 229.—Two sections from a swelling on a Juniper-bi-anch. a. From the middle of the swelling ; the ri
RMRCC6MR–. Diseases of economic plants. Plant diseases. 110 DISEASES OF ECONOMIC PLANTS Texas root rot. See cotton. Black mold (Alternaria sp.). —In addition to the ravages of this disease as upon the apple, the leaves and shoots are also attacked and the fruit injury is not limited to. Fig. 46. — You fter Bailey. the blossom end. the Kieffer. For treatment, The disease has been noted chiefly upon see apple. QUINCE Rust (Gymnosporangium clavipes C. & P.). — The quince rust, spring stage, agrees with the apple rust in general characters. The causal fungus grows upon the fruit in the summer and prod
RMRCC3RB–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 387 may be as long as 10 m.m. and are bent like a horn (Fig. 219). A similar case is described by Barclay^ in which the peridia of aecidia on Rhammis dahnrica were very long if produced in dry weather, but short if in moist weather. ^ The aecidiospores are shed during the early part of June, and germinate at once on the bark of young juniper-twigs; the mycelium growing thence into the spurs or branche
![. Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED (Juniperus) Rusts ^*^^ {Gymnosporangium sps.). — Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples/' others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," gall of the rust fungus. Original. White-rot ^^"^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the Stock Photo](https://c8.alamy.com/comp/RCDPBK/diseases-of-economic-plants-plant-diseases-trees-and-timber-383-cedar-red-juniperus-rusts-gymnosporangium-sps-several-distinct-species-of-the-parasite-occur-on-juniperus-some-of-which-produce-the-usual-quotcedar-apples-others-produce-cankers-or-witches-brooms-on-the-branches-or-spots-on-the-leaves-they-are-usually-of-but-small-significance-to-the-cedar-tree-itself-unless-exceptionally-abundant-see-apple-rust-fig-200-quotcedar-applequot-gall-of-the-rust-fungus-original-white-rot-quot-fomes-juniperinus-v-sch-in-this-dis-ease-holes-appear-in-the-RCDPBK.jpg ". Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED (Juniperus) Rusts ^*^^ {Gymnosporangium sps.). — Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples/' others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," gall of the rust fungus. Original. White-rot ^^"^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the Stock Photo")
RMRCDPBK–. Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED (Juniperus) Rusts ^*^^ {Gymnosporangium sps.). — Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples/' others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," gall of the rust fungus. Original. White-rot ^^"^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the
RMRCC65F–. Diseases of economic plants. Plant diseases. Pomaceous Fruits 67 Unless continued, careful inspection is given, and concerted action in a community maintained, but little benefit will follow. Rust ^^'^^'^^^ (Gymnosporangium sps., Roestelia). — Rust of pear is very similar in nature to rust of the apple, though less often injurious. It consists of a summer stage and a winter stage. The former produces rust on the leaves of the pear, while the winter stage of the eastern form of rust pro-. Please note that these images are extracted from scanned page images that may have been digitally enhance
RMRCC3R9–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 389 fissure-like pores in place of bordered pits. The wood-eleraents iu cross-section are no longer round but polygonal; the bast becomes very irregular, parenchyma grows rapidly, bast fibres remain thin-walled and have no longer a straight course. The mycelium fills the bast and rind, forming masses in the inter- cellular spaces; it is easiest found in the tangential section. ()n the fall of the club
RMRCNBWB–. Die Gartenwelt. Gardening. Gymnosporangium clavariaeforme. Spermagonium, auf Crataegusblättern die Epidermis durchbrechend, sp Spermatien, p sterile Saftfäden oder Paraphysen. fast gänzlich rote Färbung annimmt. Im September entstehen sodann an den, den roten Flecl<en ent- sprechenden Stellen der Blattunterseite kegelförmige, dicht gedrängte Ausstül- pungen, die etwas später sich öffnen, ein braunes Pulver, die Sporen, entlassend. Der vom Birnroste befallene Baum zeigt außerdem seinKrank- sein auch deutlich in der Ausbildung der Früchte, indem sie kleiner, schmächtiger bleiben, langsamer
RMRCC3DP–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 389 fissure-like pores in place of bordered pits. The wood-elements in cross-section are no longer round but polygonal; the bast becomes very irregular, parenchyma grows rapidly, bast fibres remain thin-walled and have no longer a straight course. The mycelium fills the bast and rind, forming masses in the inter- cellular spaces; it is easiest found in the tangential section. On tlie fall of the club-
RMRCNBW5–. Die Gartenwelt. Gardening. Gymnosporangium clavariaeforme. Spermagonium, auf Crataegusblättern die Epidermis durchbrechend, sp Spermatien, p sterile Saftfäden oder Paraphysen. fast gänzlich rote Färbung annimmt. Im September entstehen sodann an den, den roten Flecl<en ent- sprechenden Stellen der Blattunterseite kegelförmige, dicht gedrängte Ausstül- pungen, die etwas später sich öffnen, ein braunes Pulver, die Sporen, entlassend. Der vom Birnroste befallene Baum zeigt außerdem seinKrank- sein auch deutlich in der Ausbildung der Früchte, indem sie kleiner, schmächtiger bleiben, langsamer
![. Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED {Juniperus) Rusts ^"^ {Gymnosporangium sps.).—Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples," others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," iingus. Original. White-rot "^"^^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the hea Stock Photo](https://c8.alamy.com/comp/RCC69E/diseases-of-economic-plants-plant-diseases-trees-and-timber-383-cedar-red-juniperus-rusts-quot-gymnosporangium-spsseveral-distinct-species-of-the-parasite-occur-on-juniperus-some-of-which-produce-the-usual-quotcedar-applesquot-others-produce-cankers-or-witches-brooms-on-the-branches-or-spots-on-the-leaves-they-are-usually-of-but-small-significance-to-the-cedar-tree-itself-unless-exceptionally-abundant-see-apple-rust-fig-200-quotcedar-applequot-iingus-original-white-rot-quotquot-fomes-juniperinus-v-sch-in-this-dis-ease-holes-appear-in-the-hea-RCC69E.jpg ". Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED {Juniperus) Rusts ^"^ {Gymnosporangium sps.).—Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples," others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," iingus. Original. White-rot "^"^^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the hea Stock Photo")
RMRCC69E–. Diseases of economic plants. Plant diseases. Trees and Timber 383 CEDAR, RED {Juniperus) Rusts ^"^ {Gymnosporangium sps.).—Several distinct species of the parasite occur on Juniperus, some of which produce the usual "cedar-apples," others produce cankers or witches-brooms on the branches, or spots on the leaves. They are usually of but small significance to the cedar tree itself unless exceptionally abundant. See apple rust.. Fig. 200. — "Cedar-apple," iingus. Original. White-rot "^"^^ {Fomes juniperinus v. Sch.). — In this dis- ease holes appear in the hea
RMRCC3DY–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CROXARTIL'M. 383 and curl up. In some districts very common. Aecidial stage unknown. Gymnosporangium.^ Teleutospores bicellular and furni.slied with stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.^ The first-formed teleutospores are thick-. Fig. 21G.â&>)â«os;)o, the spore-cjishions. 4, others are thick-coated. iian clo.riiiuiiifoi-iiii. 1, J, â :. M.i-i - m .u v.
![. Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust (Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190. — Longitudinal section of cedar showing effect of Polyporus juniperinus. After von Schrenk. White rot (Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite t Stock Photo](https://c8.alamy.com/comp/RCDPAW/diseases-of-economic-plants-plant-diseases-trees-and-timber-435-cedar-red-rust-gymnosporangium-various-speciesthe-quotcedar-applesquot-familiar-upon-the-red-cedar-are-usually-of-but-small-significance-to-the-cedar-tree-itself-unless-exception-ally-abundant-see-apple-rust-fig-190-longitudinal-section-of-cedar-showing-effect-of-polyporus-juniperinus-after-von-schrenk-white-rot-polyporus-juniperinus-v-schrenk-in-this-disease-long-holes-appear-in-the-heartwood-extend-ing-longitudinally-with-a-partition-of-sound-wood-be-tween-these-cavities-may-eventually-unite-t-RCDPAW.jpg ". Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust (Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190. — Longitudinal section of cedar showing effect of Polyporus juniperinus. After von Schrenk. White rot (Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite t Stock Photo")
RMRCDPAW–. Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust (Gymnosporangium, various species).—The "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. Fig. 190. — Longitudinal section of cedar showing effect of Polyporus juniperinus. After von Schrenk. White rot (Polyporus juniperinus v. Schrenk). — In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities may eventually unite t
RMRCHWW8–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. 52 Uredinales. (Dietel.). •4l'.' .. - Fig. 33. A i. U Oymnosporangium juniperinum (li.). Aecidien auf Sorbus Avniparia. C—E Gymnosporangium tremelloides A. Br. C Teleutosporenpolstor auf Juniperus. D x. E Aecidien auf Sorbus Aria. A, C u. D nat. Gr. (Original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara
![. Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).âThe "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. ftion of cedar sliowins ftTcct. After von Sehrenk. Polypo White rot (Polyporus â juniperinus v. Sehrenk). â In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities maj^ eventually unite to form tubes throughout the tree. The woo Stock Photo](https://c8.alamy.com/comp/RCC6AJ/diseases-of-economic-plants-plant-diseases-trees-and-timber-435-cedar-red-rust-gymnosporangium-various-speciesthe-quotcedar-applesquot-familiar-upon-the-red-cedar-are-usually-of-but-small-significance-to-the-cedar-tree-itself-unless-exception-ally-abundant-see-apple-rust-ftion-of-cedar-sliowins-fttcct-after-von-sehrenk-polypo-white-rot-polyporus-juniperinus-v-sehrenk-in-this-disease-long-holes-appear-in-the-heartwood-extend-ing-longitudinally-with-a-partition-of-sound-wood-be-tween-these-cavities-maj-eventually-unite-to-form-tubes-throughout-the-tree-the-woo-RCC6AJ.jpg ". Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).âThe "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. ftion of cedar sliowins ftTcct. After von Sehrenk. Polypo White rot (Polyporus â juniperinus v. Sehrenk). â In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities maj^ eventually unite to form tubes throughout the tree. The woo Stock Photo")
RMRCC6AJ–. Diseases of economic plants. Plant diseases. TREES AND TIMBER 435 CEDAR, RED Rust {Gymnosporangium, various species).âThe "cedar apples," familiar upon the red cedar, are usually of but small significance to the cedar tree itself unless exception- ally abundant. See apple rust.. ftion of cedar sliowins ftTcct. After von Sehrenk. Polypo White rot (Polyporus â juniperinus v. Sehrenk). â In this disease long holes appear in the heartwood, extend- ing longitudinally with a partition of sound wood be- tween. These cavities maj^ eventually unite to form tubes throughout the tree. The woo
![. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the " bird's nest" deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On Cyprcss Stock Photo](https://c8.alamy.com/comp/RCC3P2/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-gymnosporangium-403-g-globosum-farl-aecidia-on-pzrus-mains-p-communis-iljihyaia-cuhjaris-sorhus-americana-and-species-of-crataegus-g-nidus-avis-thaxt-aecidia-and-pycnidia-on-pyrus-mains-amclanchier-canadensis-and-cydouia-vulgaris-on-the-red-cedar-it-causes-the-quot-birds-nestquot-deformation-of-the-branch-system-g-speciosum-peck-on-junipenis-oecidcntalis-g-cunninghamianum-jarcl-on-cyprcss-RCC3P2.jpg ". Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the " bird's nest" deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On Cyprcss Stock Photo")
RMRCC3P2–. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. GYMNOSPORANGIUM. 403 G. globosum Farl. Aecidia on Pz/rus Mains, P. communis, i'ljihyaia cuhjaris, Sorhus americana, and species of Crataegus. G. nidus-avis Thaxt. Aecidia and pycnidia on Pyrus Mains, Amclanchier canadensis, and Cydouia vulgaris. On the red cedar it causes the " bird's nest" deformation of the branch-system. G, speciosum Peck. On Junipenis â oecidcntalis. G. Cunninghamianum ]jarcl. On Cyprcss
RMRCC2W7–. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. Fig. 217.âSection through a swelling on a sixteen-year twig â of Juniper attacked by Gymnosporangium in its eighth year; three conical spore-cushions are indicated, also a cushion-scar with the scar-tissue. (After Woernle.). 'â 'â 'M 'â ''m ^liitlilfC Fig. 218. â Longitudinal section of a spore-cushion of GymnosporoMoium clo- viii-iiifformc. Somewhat diagrammatic. (After Woernle.) and during ra
RMRCHWW4–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. Uredinales. (Dietel.) 53 G. Nidus-avis bringt an Cupressus Ihujoides vogelnestartige Hexenbesen hervor, deren Be- nadelung von derjenigen normaler Zweige verschieden ist. — Meist 3- und 4zellige Teleutosp. haben G. biseptatum Ell. und G. Libocedri Mayr, i- bis 4zellig sind sie bei G. Ellisii (Fig. 31 H,J). Die Abtrennung dieser Art von Gymnosporangium als Hamaspora Ellisii (Berk.) Körn, ist nicht genügend beg
RMRCHEN2–. Die Pilze Böhmens. Botany; Fungi. 158 Teleutoi^poren in lauge, walzenförmige oder zungenförmige, hellrotorange Fruchtkörper vereinigt; dünnwandige Sporen 100—120 ,a lang, 10—18 /« breit, beiderseits verjüngt, dickwandige dunkler, 50—60 ft lang, 15—21 ft breit, am Scheitel abgerundet-verjüngt, zum Stiel verschmälert.. Abb. 30. Qymnospoi-aiuiium tremelloides. 1. Aecidien auf Pirus Ana. 2. Teleutosporenlager auf Juuiperus com- munis. 3 Eine Teleutospore. (Nach Dietel ; Abb. 31. Dünn- und dickwandige Teleutosporen von Gymnosporangium clavaiiaeforme. (Nach Dietel.) Aecidien im Juni auf Blättern v
RMRCDP30–. Diseases of fruit crops in the United States in 1920. Fruit Diseases and pests United States. 37 Minnogota (Lt-ach)- Not vtry prevalent; ovtr routheast quarter of state. .Wisconsin (Vaut,han)- Less than ayerage, alone, Mississippi River tluffs. Kansas (Melchers)- Present tat no damage toâ¢speak of. '. Fig. 10. Percentage loss from' apple rust as estimated .for 192O, Nature of In.jury from Rust. Three types of injury result from the attack of Gymnosporangium juniperi-viry^inianae; (l) Injury to the foliage, resulting in reduced assimi- lating surface. In some cases defoliation results;.thus L
![. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by J.D. Hooker. Botany. Gymnosporangium aurantiacum. On a branch of Jun Stock Photo](https://c8.alamy.com/comp/RDTMXP/a-general-system-of-botany-descriptive-and-analytical-in-two-parts-part-i-outlines-of-organography-anatomy-and-physiology-part-ii-descriptions-and-illustrations-of-the-orders-by-emm-le-maout-and-j-decaisne-with-5500-figures-by-l-steinheil-and-a-riocreux-translated-from-the-original-by-mrs-hooker-the-orders-arranged-after-the-method-followed-in-the-universities-and-schools-of-great-britain-its-colonies-america-and-india-with-additions-an-appendix-on-the-natural-method-and-a-synopsis-of-the-orders-by-jd-hooker-botany-gymnosporangium-aurantiacum-on-a-branch-of-jun-RDTMXP.jpg ". A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by J.D. Hooker. Botany. Gymnosporangium aurantiacum. On a branch of Jun Stock Photo")
RMRDTMXP–. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by J.D. Hooker. Botany. Gymnosporangium aurantiacum. On a branch of Jun
RMRE1NCK–. A text-book of elementary botany. Botany. Fm. 123. Uromyces and Melampsora), two-celled (as in Puccinia. or Rusts, Fig. 123, and Gymnosporangium, the so-called Cedar apples,. Fig. 124. Fig. 124), or many-celled (as in Phragmidiuvi). They rupture the epidermis and thus become exposed, but generally remain r I. 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 &am
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