. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 918 Contribution from the Bureau of Entomology, L. O. HOWARD, Chief in collaboration with the Federal Horticultural Board C. L. MARLATT. Chairman Washington, D. C. PROFESSIONAL PAPER April 19, 1921 REPORT ON INVESTIGATIONS OF THE PINK BOLLWORM OF COTTON IN MEXICO By U. C. LOFTIN, Entomological Assistant, K. B. McKINNEY, Scientific Assistant, and W. K. HANSON, Plant Quarantine Inspector CONTENTS Page The Laguna District 1 DistribationofthePinkBoUworm . ... 4 Life History 5 Seasona
. Bulletin of the Department of Agriculture. Agriculture. UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 918 Contribution from the Bureau of Entomology, L. O. HOWARD, Chief in collaboration with the Federal Horticultural Board C. L. MARLATT. Chairman Washington, D. C. PROFESSIONAL PAPER April 19, 1921 REPORT ON INVESTIGATIONS OF THE PINK BOLLWORM OF COTTON IN MEXICO By U. C. LOFTIN, Entomological Assistant, K. B. McKINNEY, Scientific Assistant, and W. K. HANSON, Plant Quarantine Inspector CONTENTS Page The Laguna District 1 DistribationofthePinkBoUworm . ... 4 Life History 5 Seasonal History 19 Feeding Habits of Larvae 21 Damage Caused by the Pinls Bollworm . 24 Food Plants 32 Page . 34 Dispersal Natural Control ^ 38 Repression 47 Summary 56 Literature Cited 57 Appendix , 58. WASHINGTON GOVERNMENT PRINTING OFFICE 1921. 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
