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Foot rot (Phoma medicaginis) infection in pea crop in pod Stock Photo
RMBDDA87–Foot rot (Phoma medicaginis) infection in pea crop in pod
Orobanche galii - Orobanche medicaginis Stock Photo
RMCX978P–Orobanche galii - Orobanche medicaginis
Foot rot (Didymella pinodella or Phoma pinodella) infection affecting the roots and stem base of pea plants Stock Photo
RM2BD27PF–Foot rot (Didymella pinodella or Phoma pinodella) infection affecting the roots and stem base of pea plants
Orobanche caryophyllacea Sm., Majella National Park Stock Photo
RM2AT7RYA–Orobanche caryophyllacea Sm., Majella National Park
Fort Pierre, Stanley, South Dakota, United States, Chelonus medicaginis McComb, Animalia, Arthropoda, Insecta, Hymenoptera, Braconidae Stock Photo
RM2D7B1TB–Fort Pierre, Stanley, South Dakota, United States, Chelonus medicaginis McComb, Animalia, Arthropoda, Insecta, Hymenoptera, Braconidae
Fungous diseases of plants . ht be considered varietal orracial, and in some instanceswe have unquestionably to dowith physiological forms. It iscertain, however, that Rliizoc-tonia Medicaginis De C. ofEurope is a fungus very differ-ent from the common potatofungus of Europe and Americaand also from the commonspecies producing damping-offof seedlings, rot of beets, etc.,in this country. Moreover, aform which has been described(Duggar and Stewart) on rhu-barb is likewise a very differentorganism. It would not, how-ever, be surprising to find thata very large number of theother forms which have Stock Photo
RM2AJ4Y99–Fungous diseases of plants . ht be considered varietal orracial, and in some instanceswe have unquestionably to dowith physiological forms. It iscertain, however, that Rliizoc-tonia Medicaginis De C. ofEurope is a fungus very differ-ent from the common potatofungus of Europe and Americaand also from the commonspecies producing damping-offof seedlings, rot of beets, etc.,in this country. Moreover, aform which has been described(Duggar and Stewart) on rhu-barb is likewise a very differentorganism. It would not, how-ever, be surprising to find thata very large number of theother forms which have
left: Bedstraw broomrapez, Orobanche caryophyllacea, right: Yellow broomrape, Orobanche medicaginis Stock Photo
RFE5E51T–left: Bedstraw broomrapez, Orobanche caryophyllacea, right: Yellow broomrape, Orobanche medicaginis
Bedstraw broomrape (Orobanche caryophyllacea) on the left, a species of Broomrape (Orobanche medicaginis) on the right Stock Photo
RMRA7A9X–Bedstraw broomrape (Orobanche caryophyllacea) on the left, a species of Broomrape (Orobanche medicaginis) on the right
. The fungi which cause plant disease . Plant diseases; Fungi. THE 'FUNGI WHICH CAUSE PLANT DISEASE 521 one in the center of each spot, but slightly prominent; conidia cylindric or clavate-cylindric, 10-25 x 1.5-2 n. On watermelon leaves. S. cucurbitacearum Sacc. is also on cucurbits. " S. cannabina Pk. is on hemp producing leaf spots. S, nicotianse Pat. is reported from France as the cause of tobacco leaf spotting."" S. doUchi B. & C. Spots white, with a broad, light brown margin; conidia straight, subfusiform, 3-septate, 40 m- On cowpeas."^ S. medicaginis Rob. & D Stock Photo
RMPG45PD–. The fungi which cause plant disease . Plant diseases; Fungi. THE 'FUNGI WHICH CAUSE PLANT DISEASE 521 one in the center of each spot, but slightly prominent; conidia cylindric or clavate-cylindric, 10-25 x 1.5-2 n. On watermelon leaves. S. cucurbitacearum Sacc. is also on cucurbits. " S. cannabina Pk. is on hemp producing leaf spots. S, nicotianse Pat. is reported from France as the cause of tobacco leaf spotting."" S. doUchi B. & C. Spots white, with a broad, light brown margin; conidia straight, subfusiform, 3-septate, 40 m- On cowpeas."^ S. medicaginis Rob. & D
Archive image from page 186 of Deutsche Flora Pharmaceutisch-medicinische Botanik Ein. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker . deutscheflorapha00kars Year: 1880-83. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern Stock Photo
RMW15X19–Archive image from page 186 of Deutsche Flora Pharmaceutisch-medicinische Botanik Ein. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker . deutscheflorapha00kars Year: 1880-83. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern
. Fig. 6.—Characteristic leaf spot of alfalfa: A, upper surface of leaves; B, lower surface of leaf. These spots are usually larger than rust spots and differ somewhat in color, so that the two diseases can be readily distinguished. (From Cir. 326.) peziza medicaginis. Early- cutting of heavily infected fields before the leaves begin to fall is recommended. Mosaic.—Plants affected with mosaic, a virus disease, are slightly Stock Photo
RMMCK9MD–. Fig. 6.—Characteristic leaf spot of alfalfa: A, upper surface of leaves; B, lower surface of leaf. These spots are usually larger than rust spots and differ somewhat in color, so that the two diseases can be readily distinguished. (From Cir. 326.) peziza medicaginis. Early- cutting of heavily infected fields before the leaves begin to fall is recommended. Mosaic.—Plants affected with mosaic, a virus disease, are slightly
Footrot (Didymella pinodella or Phoma pinodella) infection creating gaps in a mature pea crop Stock Photo
RM2BD27PB–Footrot (Didymella pinodella or Phoma pinodella) infection creating gaps in a mature pea crop
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . ALFA The Alfalfa Leaf=blight Cercospora helvola var. medicaginis This disease has been studied by Professor F. D.Chester, of Delaware, who reports that it *^ shows itselfupon the leaf as sub-circnlar, or elliptical spots of asmoky brown, or almost black color, equally visible uponboth sides, and vary-ing from one-six-teenth to oue-thirty-second of an inch indiameter. The spotsare without well-de-fined borders, which,when closely exam-ined, are somewhatirreg Stock Photo
RM2AXHWEF–Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . ALFA The Alfalfa Leaf=blight Cercospora helvola var. medicaginis This disease has been studied by Professor F. D.Chester, of Delaware, who reports that it *^ shows itselfupon the leaf as sub-circnlar, or elliptical spots of asmoky brown, or almost black color, equally visible uponboth sides, and vary-ing from one-six-teenth to oue-thirty-second of an inch indiameter. The spotsare without well-de-fined borders, which,when closely exam-ined, are somewhatirreg
. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Discomycetes. Persistentes. 143. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, we Stock Photo
RMPF9FJF–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Discomycetes. Persistentes. 143. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, we
Diseases of field crops in Diseases of field crops in the Prairie Provinces disoffieldcrop Year: 1957 (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. At a later stage Stock Photo
RMT1H8K3–Diseases of field crops in Diseases of field crops in the Prairie Provinces disoffieldcrop Year: 1957 (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. At a later stage
. Uromyces medicag^inis on iv^edica^^o sativa L. according to J. C. Arthur* " " »⢠" "past Survey reports .iedica^o lupulina L- " 1922 " " J. C, Arthur Mg. 37' Occurrence of Uromynes s bri atus (U. medicaginis) in the United States (*N. iiin. PI. J^z 25G-257. i^pr. I5, I912) i Stock Photo
RMMCRFG5–. Uromyces medicag^inis on iv^edica^^o sativa L. according to J. C. Arthur* " " »⢠" "past Survey reports .iedica^o lupulina L- " 1922 " " J. C, Arthur Mg. 37' Occurrence of Uromynes s bri atus (U. medicaginis) in the United States (*N. iiin. PI. J^z 25G-257. i^pr. I5, I912) i
Fungous diseases of plants . quentlyin the United States. As aresult, certain observationsmay be stated. In the firstplace, the common alfalfaroot fungus of Europe {Rhi-zoctonia Medicaginis) is thesame as the European rootfungus of asparagus {Aspara-gus offLcinalis). This speciesalso occurs less frequentlyupon the sugar beet {Betaoulgaris), and, doubtless,upon other cultivated andwild plants. The fungus ap-pears upon the root as a closeweft of violet-colored hyphae(Fig. 239), composed of cellsmore or less uniform in diam-eter, filamentous, branched,but without a particularlycharacteristic type Stock Photo
RM2AJ4JN4–Fungous diseases of plants . quentlyin the United States. As aresult, certain observationsmay be stated. In the firstplace, the common alfalfaroot fungus of Europe {Rhi-zoctonia Medicaginis) is thesame as the European rootfungus of asparagus {Aspara-gus offLcinalis). This speciesalso occurs less frequentlyupon the sugar beet {Betaoulgaris), and, doubtless,upon other cultivated andwild plants. The fungus ap-pears upon the root as a closeweft of violet-colored hyphae(Fig. 239), composed of cellsmore or less uniform in diam-eter, filamentous, branched,but without a particularlycharacteristic type
. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, wellig gewunden, uureg'elmässig'-r Stock Photo
RMPF9FJ8–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, wellig gewunden, uureg'elmässig'-r
. Fig. 1.—A group of alfalfa plants affected with bacterial wilt. The dwarfed condition of the plants and the abnormality of the leaves are clearly evident when compared with the healthy plants shown in the background. (Courtesy of F. R. Jones, United States Department of Agriculture; from Cir. 326.) caused by Phytomonas medicaginis, is common in California but attacks alfalfa only after freezing weather, so that the effects are not seen much except in the spring on the first cutting. After a cold winter, there may be a considerable loss in the alfalfa hay crop on account of this disease. The Stock Photo
RMMCK9MB–. Fig. 1.—A group of alfalfa plants affected with bacterial wilt. The dwarfed condition of the plants and the abnormality of the leaves are clearly evident when compared with the healthy plants shown in the background. (Courtesy of F. R. Jones, United States Department of Agriculture; from Cir. 326.) caused by Phytomonas medicaginis, is common in California but attacks alfalfa only after freezing weather, so that the effects are not seen much except in the spring on the first cutting. After a cold winter, there may be a considerable loss in the alfalfa hay crop on account of this disease. The
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ht be considered varietal orracial, and in some instanceswe have unquestionably to dowith physiological forms. It iscertain, however, that Rhizoc-tonia Medicaginis De C. ofEurope is a fungus very differ-ent from the common potatofungus of Europe and Americaand also from the commonspecies producing damping-offof seedlings, rot of beets, etc.,in this country. Moreover, aform which has been described(Duggar and Stewart) on rhu-barb is likewise a very differentorganism. It would not, how-ever, be surprising Stock Photo
RM2CDCAJF–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ht be considered varietal orracial, and in some instanceswe have unquestionably to dowith physiological forms. It iscertain, however, that Rhizoc-tonia Medicaginis De C. ofEurope is a fungus very differ-ent from the common potatofungus of Europe and Americaand also from the commonspecies producing damping-offof seedlings, rot of beets, etc.,in this country. Moreover, aform which has been described(Duggar and Stewart) on rhu-barb is likewise a very differentorganism. It would not, how-ever, be surprising
. The fungi which cause plant disease . Plant diseases; Fungi. 630 THE FUNGI WHICH CAUSE PLANT DISEASE On cowpea and bean in America. Usually causing but slight damage. C. vignae Rac. (not E. & E.) is described as injurious to the cowpea in Java.'"* C. medicaginis E. & E. Spots amphigenous, smoky to black, 0.5-5 mm. in diameter, orbicular, indefinite; conidiophores subhyaline, becoming brown- ish, continuous, geniculate, 35-45 x 4-5 n; conidia cylindric- fusoid, 3 to 6-septate, 40-60 x 3 /x. On alfalfa and crimson clover.'^* C. aximinensis Br. & Cav. is foimd on sulla leaves; Stock Photo
RMPG45G3–. The fungi which cause plant disease . Plant diseases; Fungi. 630 THE FUNGI WHICH CAUSE PLANT DISEASE On cowpea and bean in America. Usually causing but slight damage. C. vignae Rac. (not E. & E.) is described as injurious to the cowpea in Java.'"* C. medicaginis E. & E. Spots amphigenous, smoky to black, 0.5-5 mm. in diameter, orbicular, indefinite; conidiophores subhyaline, becoming brown- ish, continuous, geniculate, 35-45 x 4-5 n; conidia cylindric- fusoid, 3 to 6-septate, 40-60 x 3 /x. On alfalfa and crimson clover.'^* C. aximinensis Br. & Cav. is foimd on sulla leaves;
. (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. At a later stage the diseased areas become speckled with the small black fruiting bodies. (8) Speckled leaf blotch of Stock Photo
RMMCKW9G–. (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. At a later stage the diseased areas become speckled with the small black fruiting bodies. (8) Speckled leaf blotch of
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ?#^^. ^?^*.j Fig. yy a. Alfalfa Leaf Spot. (Photograph by H. H. Whetzel) Pseudopeziza. In this genus the apothecium is formed beneaththe epidermis, which is later ruptured, and the mature fruit bodyis relatively simple in structure and shallow. The asci contain eightunicellular spores. XIII. ALFALFA LEAF SPOT Pseudopeziza Medicaginis (Lib.) Sacc. Combs, Robt. The Alfalfa Leaf Spot Disease. Iowa Agl. Exp. Sta. Built.36: 858-859. The alfalfa leaf spot is often very abundant both in Europeand America, and p Stock Photo
RM2CDCE6D–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . ?#^^. ^?^*.j Fig. yy a. Alfalfa Leaf Spot. (Photograph by H. H. Whetzel) Pseudopeziza. In this genus the apothecium is formed beneaththe epidermis, which is later ruptured, and the mature fruit bodyis relatively simple in structure and shallow. The asci contain eightunicellular spores. XIII. ALFALFA LEAF SPOT Pseudopeziza Medicaginis (Lib.) Sacc. Combs, Robt. The Alfalfa Leaf Spot Disease. Iowa Agl. Exp. Sta. Built.36: 858-859. The alfalfa leaf spot is often very abundant both in Europeand America, and p
. Pig. b3- Occurrence of and percentage losses from Pseudopeziza Hiedicag- inis (above line) and Pyrenopeziza medicaginis (belov; line) in I92I. Rust caused by Uromyces medicaginis Pass. Rust was reported from several states although it apparently did little damage in any of them. In North Carolina it was unimportant and occurred mostly in the Piedmont and Mountain counties; in Mississippi it v/as unimportant ani occurred locally; in Louisiana the importance was considerable, according to Edgerton; in Texas there v/as a slight trace in the Rio Grande Valley. It Stock Photo
RMMCRCAY–. Pig. b3- Occurrence of and percentage losses from Pseudopeziza Hiedicag- inis (above line) and Pyrenopeziza medicaginis (belov; line) in I92I. Rust caused by Uromyces medicaginis Pass. Rust was reported from several states although it apparently did little damage in any of them. In North Carolina it was unimportant and occurred mostly in the Piedmont and Mountain counties; in Mississippi it v/as unimportant ani occurred locally; in Louisiana the importance was considerable, according to Edgerton; in Texas there v/as a slight trace in the Rio Grande Valley. It
. Bulletin of the U.S. Department of Agriculture. Agriculture. Habrocytus medicaginis. A, Adult; B, cages for rearing parasite larvae; C, larva; D, larva destroying its host larva; E, pupa.. 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.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off. Stock Photo
RMRGBJ5H–. Bulletin of the U.S. Department of Agriculture. Agriculture. Habrocytus medicaginis. A, Adult; B, cages for rearing parasite larvae; C, larva; D, larva destroying its host larva; E, pupa.. 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.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
. Cooperative economic insect report. Beneficial insects; Insect pests. Damage to Alfalfa. General Distribution of Contarinia medicaginis Kieffer (Cecidomyiidae, Diptera) No. 134 of Series. 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.. United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Divisio Stock Photo
RMRE83AW–. Cooperative economic insect report. Beneficial insects; Insect pests. Damage to Alfalfa. General Distribution of Contarinia medicaginis Kieffer (Cecidomyiidae, Diptera) No. 134 of Series. 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.. United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Divisio
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Fig, 3.âMycelium and conidiumUke structures developing from ascospores of Pseudo- pezlza medicaginis on agar agar. X 400. mycelium of P. trifoUl furnish an easy morphological distinction between the two species. REPORTED CONIDIAL STAGES OF THESE FUNGI. It is a matter of some interest to note that all the studies of Pseuclopeziza on alfalfa and clover which have been made by European mycologists and pathologists with but a single exception (Briosi, 1888) have contained a discussion of an associated conidial stage. Thus Stock Photo
RMRGC3BE–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Fig, 3.âMycelium and conidiumUke structures developing from ascospores of Pseudo- pezlza medicaginis on agar agar. X 400. mycelium of P. trifoUl furnish an easy morphological distinction between the two species. REPORTED CONIDIAL STAGES OF THESE FUNGI. It is a matter of some interest to note that all the studies of Pseuclopeziza on alfalfa and clover which have been made by European mycologists and pathologists with but a single exception (Briosi, 1888) have contained a discussion of an associated conidial stage. Thus
. Cooperative economic insect report. Insect pests Control United States Periodicals. General Distribution of Contarinia medicaginis Kieffer (Cecidomyiidae, Diptera) No. 134 of Series. 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.. United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Branch; United States. Plant Pest Control Division; United States. Animal and Plant Health Inspection Stock Photo
RMRE8FH7–. Cooperative economic insect report. Insect pests Control United States Periodicals. General Distribution of Contarinia medicaginis Kieffer (Cecidomyiidae, Diptera) No. 134 of Series. 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.. United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Branch; United States. Plant Pest Control Division; United States. Animal and Plant Health Inspection
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. LEAF-SPOT OF ALFALFA AND RED CLOVER. 9 absent. In striking contrast is the scarcity of these spores on my- celium from spores of P. trifolii. (Fig. 4.) Never are they pro- duced in great numbers, and frequently they are entirely absent from all but a few fungous colonies. Thus, the striking abundance of these structures on mycelium of P. medicaginis and their scarcity on. Fig, 3.âMycelium and conidiumUke structures developing from ascospores of Pseudo- pezlza medicaginis on agar agar. X 400. mycelium of P. trifoUl furn Stock Photo
RMRGC3C1–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. LEAF-SPOT OF ALFALFA AND RED CLOVER. 9 absent. In striking contrast is the scarcity of these spores on my- celium from spores of P. trifolii. (Fig. 4.) Never are they pro- duced in great numbers, and frequently they are entirely absent from all but a few fungous colonies. Thus, the striking abundance of these structures on mycelium of P. medicaginis and their scarcity on. Fig, 3.âMycelium and conidiumUke structures developing from ascospores of Pseudo- pezlza medicaginis on agar agar. X 400. mycelium of P. trifoUl furn
. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). DISEASES OF ALFALFA AND CLOVER Charles Gregory, Ithaca, N. Y, Assistant Professor of Plant Pathology, Cornell University. LEAF SPOT (See introductory paragraph under diseases of timothy, page 2757.) Leaf spot, Pseudopeziza medicaginis (Lib.) Sacc, is always found on alfalfa and clover leaves, and sometimes on the stem. It is particularly severe during rather dry seasons. On alfalfa there are pro- duced small yellow spots, which, if abundant, will cause dropping of the leaves. The new leaves may become infec Stock Photo
RMRM8GE9–. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). DISEASES OF ALFALFA AND CLOVER Charles Gregory, Ithaca, N. Y, Assistant Professor of Plant Pathology, Cornell University. LEAF SPOT (See introductory paragraph under diseases of timothy, page 2757.) Leaf spot, Pseudopeziza medicaginis (Lib.) Sacc, is always found on alfalfa and clover leaves, and sometimes on the stem. It is particularly severe during rather dry seasons. On alfalfa there are pro- duced small yellow spots, which, if abundant, will cause dropping of the leaves. The new leaves may become infec
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Bui. 812, U. S. Dept. of Agriculture. Plate VII.. Habrocytus medicaginis. A, Adult; B, cages for rearing parasite larvae; C, larva; D, larva destroying its host larva; E, pupa.. 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.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O. Stock Photo
RMRGBMTN–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Bui. 812, U. S. Dept. of Agriculture. Plate VII.. Habrocytus medicaginis. A, Adult; B, cages for rearing parasite larvae; C, larva; D, larva destroying its host larva; E, pupa.. 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.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Ht •?r- •*" "w mm. «« "VP PSEUDOPEZIZA ON ALFALFA. A, Apothecia of Pseudopeziza developing on old leaf-spots on overwintered leaves. In many cases the apothecia are clustered. X 3, approximately. B, Apothecia of Pseudopeziza on an alfalfa leaflet. The leaf has been decolorized to show the fungus more clearly. The small dark circles near the lower right-hand edge of the leaf are early stages of apothecia of Pyrenopeziza medicaginis. X 5, approximately.. Please note that these images are extracted from sca Stock Photo
RMRGC3CD–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Ht •?r- •*" "w mm. «« "VP PSEUDOPEZIZA ON ALFALFA. A, Apothecia of Pseudopeziza developing on old leaf-spots on overwintered leaves. In many cases the apothecia are clustered. X 3, approximately. B, Apothecia of Pseudopeziza on an alfalfa leaflet. The leaf has been decolorized to show the fungus more clearly. The small dark circles near the lower right-hand edge of the leaf are early stages of apothecia of Pyrenopeziza medicaginis. X 5, approximately.. Please note that these images are extracted from sca
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. jiW;^^«-ru Washington, D. C. PROFESSIONAL PAPER June 19, 1919 THE LEAF-SPOT DISEASES OF ALFALFA AND RED CLOVER CAUSED BY THE FUNGI PSEUDO- PEZIZA MEDICAGINIS AND PSUEDOPEZIZA TRI- FOLII, RESPECTIVELY. By Feed Reuel JoneS; Pathologist, Cotton, Truck, and Forage Crop Disease Investigations. CONTENTS. Scope of the investigation 1 The diseases 2 Economic importance 2 Description of the disease on alfalfa 3 Description of the disease on red clover.. 4 Host Stock Photo
RMRGC3E6–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. jiW;^^«-ru Washington, D. C. PROFESSIONAL PAPER June 19, 1919 THE LEAF-SPOT DISEASES OF ALFALFA AND RED CLOVER CAUSED BY THE FUNGI PSEUDO- PEZIZA MEDICAGINIS AND PSUEDOPEZIZA TRI- FOLII, RESPECTIVELY. By Feed Reuel JoneS; Pathologist, Cotton, Truck, and Forage Crop Disease Investigations. CONTENTS. Scope of the investigation 1 The diseases 2 Economic importance 2 Description of the disease on alfalfa 3 Description of the disease on red clover.. 4 Host
. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Mfll UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 759 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief Washington, D. C. PROFESSIONAL PAPER June 19, 1919 THE LEAF-SPOT DISEASES OF ALFALFA AND RED CLOVER CAUSED BY THE FUNGI PSEU- DOPEZIZA MEDICAGINIS AND P^EUDOPEZIZA TRIFOLH, RESPECTIVELY By FRED REUEL JONES, Pathologist, Cotton, Truck, and Forage Crop Disease Investigations CONTENTS Page Scope of the Investigation 1 I'he Diseases 2 Economic Importance ...... 2 Description of the Disease on Al Stock Photo
RMRGBGJR–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Mfll UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 759 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief Washington, D. C. PROFESSIONAL PAPER June 19, 1919 THE LEAF-SPOT DISEASES OF ALFALFA AND RED CLOVER CAUSED BY THE FUNGI PSEU- DOPEZIZA MEDICAGINIS AND P^EUDOPEZIZA TRIFOLH, RESPECTIVELY By FRED REUEL JONES, Pathologist, Cotton, Truck, and Forage Crop Disease Investigations CONTENTS Page Scope of the Investigation 1 I'he Diseases 2 Economic Importance ...... 2 Description of the Disease on Al
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 139 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ALFALFA FLOWER MIDGE (Contariaia medicaginis Kieffer) Economic Importance: This midge is a pest of alfalfa in most alfalfa-growing areas of Europe. Severe damage has been reported on occasions during the past 25 years in Sweden, Denmark, Germany, Czechoslovakia and Yugoslavia. Infest- ations of 100 percent were recorded in 1937 in Sweden, and more recently, a 50 percent infestation was recorded in Yugoslavia. The severity of infest- ations depends a grea Stock Photo
RMRE8FHB–. Cooperative economic insect report. Insect pests Control United States Periodicals. - 139 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ALFALFA FLOWER MIDGE (Contariaia medicaginis Kieffer) Economic Importance: This midge is a pest of alfalfa in most alfalfa-growing areas of Europe. Severe damage has been reported on occasions during the past 25 years in Sweden, Denmark, Germany, Czechoslovakia and Yugoslavia. Infest- ations of 100 percent were recorded in 1937 in Sweden, and more recently, a 50 percent infestation was recorded in Yugoslavia. The severity of infest- ations depends a grea
. Cooperative economic insect report. Beneficial insects; Insect pests. 139 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ALFALFA FLOWER MIDGE (Contariaia medicaginis Kieffer) Economic Importance: This midge is a pest of alfalfa in most alfalfa-growing areas of Europe. Severe damage has been reported on occasions during the past 25 years in Sweden, Denmark, Germany, Czechoslovakia and Yugoslavia. Infest- ations of 100 percent were recorded in 1937 in Sweden, and more recently, a 50 percent infestation was recorded in Yugoslavia. The severity of infest- ations depends a great deal upon the Stock Photo
RMRE83B1–. Cooperative economic insect report. Beneficial insects; Insect pests. 139 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES ALFALFA FLOWER MIDGE (Contariaia medicaginis Kieffer) Economic Importance: This midge is a pest of alfalfa in most alfalfa-growing areas of Europe. Severe damage has been reported on occasions during the past 25 years in Sweden, Denmark, Germany, Czechoslovakia and Yugoslavia. Infest- ations of 100 percent were recorded in 1937 in Sweden, and more recently, a 50 percent infestation was recorded in Yugoslavia. The severity of infest- ations depends a great deal upon the
. Annalen des Naturhistorischen Museums in Wien. Naturhistorisches Museum (Austria); Natural history. Die Lepidopterenfauna Kretas.. Fig. 4. Raupennester von Tliaumetopoea pityocampa SchilT. Aus einer in Kavusi gefundenen Puppe entwickelte sicli ein normales cT dieser Art (Rbl.). In Griechenland und Kleinasien verbreitet. Lasiocampidae. 53. Lasiocampa trifolii Schiff. (976). Holtz fand eine Raupe bei Candia, welche sich auch zur Puppe verwandelte, welche jedoch eintrocknete. Der aus der Puppe geschälte Falter (o) läßt es zweifel- haft sein, ob die Form medicaginis Bkh. oder terreni H.-S. vorli Stock Photo
RMRN3NBA–. Annalen des Naturhistorischen Museums in Wien. Naturhistorisches Museum (Austria); Natural history. Die Lepidopterenfauna Kretas.. Fig. 4. Raupennester von Tliaumetopoea pityocampa SchilT. Aus einer in Kavusi gefundenen Puppe entwickelte sicli ein normales cT dieser Art (Rbl.). In Griechenland und Kleinasien verbreitet. Lasiocampidae. 53. Lasiocampa trifolii Schiff. (976). Holtz fand eine Raupe bei Candia, welche sich auch zur Puppe verwandelte, welche jedoch eintrocknete. Der aus der Puppe geschälte Falter (o) läßt es zweifel- haft sein, ob die Form medicaginis Bkh. oder terreni H.-S. vorli
. The fungi which cause plant disease . Plant diseases; Fungi. THE 'FUNGI WHICH CAUSE PLANT DISEASE 521 one in the center of each spot, but slightly prominent; conidia cylindric or clavate-cylindric, 10-25 x 1.5-2 n. On watermelon leaves. S. cucurbitacearum Sacc. is also on cucurbits. " S. cannabina Pk. is on hemp producing leaf spots. S, nicotianse Pat. is reported from France as the cause of tobacco leaf spotting."" S. doUchi B. & C. Spots white, with a broad, light brown margin; conidia straight, subfusiform, 3-septate, 40 m- On cowpeas."^ S. medicaginis Rob. & D Stock Photo
RMRDE591–. The fungi which cause plant disease . Plant diseases; Fungi. THE 'FUNGI WHICH CAUSE PLANT DISEASE 521 one in the center of each spot, but slightly prominent; conidia cylindric or clavate-cylindric, 10-25 x 1.5-2 n. On watermelon leaves. S. cucurbitacearum Sacc. is also on cucurbits. " S. cannabina Pk. is on hemp producing leaf spots. S, nicotianse Pat. is reported from France as the cause of tobacco leaf spotting."" S. doUchi B. & C. Spots white, with a broad, light brown margin; conidia straight, subfusiform, 3-septate, 40 m- On cowpeas."^ S. medicaginis Rob. & D
. The fungi which cause plant disease . Plant diseases; Fungi. 630 THE FUNGI WHICH CAUSE PLANT DISEASE On cowpea and bean in America. Usually causing but slight damage. C. vignae Rac. (not E. & E.) is described as injurious to the cowpea in Java.'"* C. medicaginis E. & E. Spots amphigenous, smoky to black, 0.5-5 mm. in diameter, orbicular, indefinite; conidiophores subhyaline, becoming brown- ish, continuous, geniculate, 35-45 x 4-5 n; conidia cylindric- fusoid, 3 to 6-septate, 40-60 x 3 /x. On alfalfa and crimson clover.'^* C. aximinensis Br. & Cav. is foimd on sulla leaves; Stock Photo
RMRDE4X4–. The fungi which cause plant disease . Plant diseases; Fungi. 630 THE FUNGI WHICH CAUSE PLANT DISEASE On cowpea and bean in America. Usually causing but slight damage. C. vignae Rac. (not E. & E.) is described as injurious to the cowpea in Java.'"* C. medicaginis E. & E. Spots amphigenous, smoky to black, 0.5-5 mm. in diameter, orbicular, indefinite; conidiophores subhyaline, becoming brown- ish, continuous, geniculate, 35-45 x 4-5 n; conidia cylindric- fusoid, 3 to 6-septate, 40-60 x 3 /x. On alfalfa and crimson clover.'^* C. aximinensis Br. & Cav. is foimd on sulla leaves;
. Bulletin trimestriel de la Société mycologique de France. Mycology; Fungi; Fungi. 22 N. RANOIEVITCH. nis, 4,S-8,o X 1-1,75 |jl. Sporoplioris ramosis, septatis, ramulis bis dichotomis vel subternis, cuspidatis, byalinis, lG.5-28 X l,o-4 ia. Sur les feuilles vivantes de Medicago sativa L., cultivé aux environs de Jausiers, au mois de juillet 1917. Dilfère complètement même de Leptothyrinm Medicaginis Pass. sur la même plante nourricière. 11. Leptostromells hysterioides (Fr.) Sacc. var. Cala- magrostidis. nova var. Stromatibus subepidermidis, dein erumpentibus, gregariis, li- nearibus, Stock Photo
RMRG99MB–. Bulletin trimestriel de la Société mycologique de France. Mycology; Fungi; Fungi. 22 N. RANOIEVITCH. nis, 4,S-8,o X 1-1,75 |jl. Sporoplioris ramosis, septatis, ramulis bis dichotomis vel subternis, cuspidatis, byalinis, lG.5-28 X l,o-4 ia. Sur les feuilles vivantes de Medicago sativa L., cultivé aux environs de Jausiers, au mois de juillet 1917. Dilfère complètement même de Leptothyrinm Medicaginis Pass. sur la même plante nourricière. 11. Leptostromells hysterioides (Fr.) Sacc. var. Cala- magrostidis. nova var. Stromatibus subepidermidis, dein erumpentibus, gregariis, li- nearibus,
. Diseases of field crops in the Prairie Provinces. Plants; Cultures de plein champ; Cultures de plein champ; Plantes. (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. A Stock Photo
RMRCCK1J–. Diseases of field crops in the Prairie Provinces. Plants; Cultures de plein champ; Cultures de plein champ; Plantes. (1) Common leaf spot of alfalfa caused by Pseudopeziza medicaginis. (2) Northern anthrac- nose on red clover caused by Kabatiella caulivora. (3) Bacterial wilt of alfalfa caused by Corynebacterium insidiosum, (4) Downy mildew of sunflowers caused by Plasmopara halstcilii. (5) Bacterial black chaff of wheat caused by Xanthomonas translucent. (6) Net blotch of barley caused by Helminthosporium teres. (7) Speckled leaf disease of wheat caused by Septoria avenae f. sp. triticea. A
. Diseases of field crops. Plant diseases. 12 California Agricultural Extension Service [Cir- 121 also show similar spots. Small, dark-colored, raised disks or blisters in the centers of the spots distinguish this disease from all other fungus spots on alfalfa leaves. The organism that causes this disease is Pseudo-. Fig. 6.—Characteristic leaf spot of alfalfa: A, upper surface of leaves; B, lower surface of leaf. These spots are usually larger than rust spots and differ somewhat in color, so that the two diseases can be readily distinguished. (From Cir. 326.) peziza medicaginis. Early- cuttin Stock Photo
RMRCDP90–. Diseases of field crops. Plant diseases. 12 California Agricultural Extension Service [Cir- 121 also show similar spots. Small, dark-colored, raised disks or blisters in the centers of the spots distinguish this disease from all other fungus spots on alfalfa leaves. The organism that causes this disease is Pseudo-. Fig. 6.—Characteristic leaf spot of alfalfa: A, upper surface of leaves; B, lower surface of leaf. These spots are usually larger than rust spots and differ somewhat in color, so that the two diseases can be readily distinguished. (From Cir. 326.) peziza medicaginis. Early- cuttin
. Diseases of field crops. Plant diseases. 14 California Agricultural Extension Service [Cir. 121 Alfalfa seriously affected with nematode should be plowed up and the land kept in a cultivated crop for at least three years with special care to completely kill out every plant of alfalfa. Yellow Leaf Blotch.—This is a leaf-spot disease caused by the fungus Pyrenopeziza medicaginis. It is distinguished from ordinary leaf spot, which is caused by a different fungus (p. 11), by the fact that the spots. Fig. 8.—Effects of stem nematode on alfalfa. are of a bright yellow or orange color, with little Stock Photo
RMRCDP8X–. Diseases of field crops. Plant diseases. 14 California Agricultural Extension Service [Cir. 121 Alfalfa seriously affected with nematode should be plowed up and the land kept in a cultivated crop for at least three years with special care to completely kill out every plant of alfalfa. Yellow Leaf Blotch.—This is a leaf-spot disease caused by the fungus Pyrenopeziza medicaginis. It is distinguished from ordinary leaf spot, which is caused by a different fungus (p. 11), by the fact that the spots. Fig. 8.—Effects of stem nematode on alfalfa. are of a bright yellow or orange color, with little
. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Discomycetes. Persistentes. 143. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, we Stock Photo
RMRCRCRX–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Discomycetes. Persistentes. 143. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, we
. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, wellig gewunden, uureg'elmässig'-r Stock Photo
RMRCRCRT–. Deutsche Flora. Pharmaceutisch-medicinische Botanik. Ein Grundriss der systematischen Botanik zum Selbststudium für Aerzte, Apotheker und Botaniker. Plants; Medicinal plants. Phacidinm Fr. Fig. 70. Frucht hornig, kreisrund, von der Mitte nach dem Umfange klappig-, unregelmässig geöffnet, sitzend, dem Nährkörper eiii- gewaclisen. P. Pini Fr. P. Ledi Schmidt. P. Ilicis Lib. 70. P. Aquifolii Sehn. Go- nidienform ist Ceuthospora phacidioides Grev. P. Medicaginis Lasch. Auf lebenden Blät- tern von Luzerne und Klee. Rhytisma Fr. Frucht hornig, läng- lich, wellig gewunden, uureg'elmässig'-r
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