. Bulletin of the 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
. Bulletin of the 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 Alfalfa 3 Description of the Disease on Red Clover 4 Host Plants 5 The Fungi „ 5 Synonomy of Pseudopeziza trifolii . 5 Synonomy of Pseudopeziza medi- caginis 6 Comparative Morphology of the Fungi 6 Morphological Characters in Culture 8 The Fungi—Continued. Reported Conidial Stages of These Fungi . o 9 Physiology of the Fungi 11 Pathogenicity of the Fungi .... 19 Life History of the Causal Organism in Relation to the Host Plants . . ': 27 American Studies Bearing on Life History 27 Method of Overwintering .... 28 Method of Distribution 30 Summary „ 35 Literature Cited 36. WASHINGTON GOVERNMENT PRINTING OFFICE 1919. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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