. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 809 Contribatlon from the Bureau of Entoniolo2)' L. O. HOWARD, Chief Washington, 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 at the Age at Which It Dies of American Fonlbrood . 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 Americ&n
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 809 Contribatlon from the Bureau of Entoniolo2)' L. O. HOWARD, Chief Washington, 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 at the Age at Which It Dies of American Fonlbrood . 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 Americ&n 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 Drugs on American Foulbrood 32 Modes of Transmission . 34 Diagnosis ...36 Prognosis ' 38 Summary and Conclusions 39 Literature Cited 42 Explanation of Plates 4S. 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 Dept. : Supt. of Docs. , G. P. O.
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