. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OP AGRICULTURE BULLETIN No. 809 Contribation from the Barean of Entomology L. O. HOWARD, Chief Wasliington, D. C. PROFESSIONAL PAPER March 10,1920 AMERICAN FOULBROOD By G. F. WHITE Specialist in Insect Diseases CONTENTS .Page Introduction ......•• 1 Name of the Disease 2 Healthy Brood &t the Age at Which It Dies of American Foulbrood . 3 Symptoms 6 Etiology ....11 Technique 17 Thermal Death Point of American Foulbrood Spores 22 Resistance of American Foulbrood Spores to Drying 29 Resistance of American
. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OP AGRICULTURE BULLETIN No. 809 Contribation from the Barean of Entomology L. O. HOWARD, Chief Wasliington, D. C. PROFESSIONAL PAPER March 10,1920 AMERICAN FOULBROOD By G. F. WHITE Specialist in Insect Diseases CONTENTS .Page Introduction ......•• 1 Name of the Disease 2 Healthy Brood &t the Age at Which It Dies of American Foulbrood . 3 Symptoms 6 Etiology ....11 Technique 17 Thermal Death Point of American Foulbrood Spores 22 Resistance of American Foulbrood Spores to Drying 29 Resistance of American Foulbrood Spores to Direct Sunlight ... 29 Resistance of American Foulbrood Spores to Fermentation .... 31 Resistance of American Foulbrood Spores to Chemical Disinfectants . 31 Effect of Drags on American Foulbrood .32 Modes of Transmission 34 Diagnosis . 36 Prognosis 38 Summary and Conclusions 39 Literature Cited ...42 Explanation of Plates ............ 45. WASHINGTON GOVERNMENT PRINTING OFFICE 1920. 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 Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
