The Reproduction-Diapause Approach to Population Control of the Boll Weevil123

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Abstract
Six applications of a spray of methyl parathion (0.5 lb per acre) were made at 4- to 5-day intervals to isolated cotton fields in Carroll County, Mississippi, to control reproducing and diapausing boll weevils, Anthonomus grandis Boheman, during the fall. The most effective follow up procedure included chemical defoliation of cotton plants to limit the available weevil food, and a final application in October of Bidrin® (3-hydroxy-N, N-dimethyl-cis-crotonamide dimethyl phosphate) at 1 lb per acre. Examination of seedling cotton from the treated fields the following spring indicated that in 1 field only 2.7 weevils per acre had survived the control program and the winter weather. The boll weevil population in the treated fields did not rise to damaging proportions until mid-August (the 2nd generation).

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