. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 358 Contribution from the Bureau of Entomology L. O. HOWARD, Chief Washington, D. C. PROFESSIONAL PAPER April 12,1916 STUDIES OF THE MEXICAN COTTON BOLL WEEVIL IN THE MISSISSIPPI VALLEY By R. W. HOWE, Entomological Assistant, Southern Field Crop Insect Investigations CONTENTS Page Introduction 1 Longevity of Adult Weevils 3 Food Plants of the Weevil 8 Feeding Habits on Cotton Leaves and Terminals 11 Sex of Adults 12 Period From Emergence to Oviposition . 12 Period From F
. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 358 Contribution from the Bureau of Entomology L. O. HOWARD, Chief Washington, D. C. PROFESSIONAL PAPER April 12,1916 STUDIES OF THE MEXICAN COTTON BOLL WEEVIL IN THE MISSISSIPPI VALLEY By R. W. HOWE, Entomological Assistant, Southern Field Crop Insect Investigations CONTENTS Page Introduction 1 Longevity of Adult Weevils 3 Food Plants of the Weevil 8 Feeding Habits on Cotton Leaves and Terminals 11 Sex of Adults 12 Period From Emergence to Oviposition . 12 Period From First Feeding on Squares to Oviposition 13 Fecundity 13 Oviposition Period 23 Rate of Oviposition . 24 Page Maximum Number of Eggs Per Day '. 24 Period from Deposition of Last Egg to Death 24 Activity of Females in Different Parts of the Day ' . . 25 Cessation of Oviposition by Hibernated Weevils .„ 26 Total Developmental Period 26 Effect of Size of Square on Weevil De- velopment 30 Generations 30 Summary 31. WASHINGTON GOVERNMENT PRINTING OFFICE 1916. 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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