Abstract
Populations of arthropod predators and of the bollworm, Heliothis zea (Boddie), and the tobacco budworm, H. virescens (F.), were studied after foliar applications of Azodrin® (3-hydroxy- N -methyl- cis -crotonamide dimethyl phosphate), Bidrin® (3-hydroxy- N, N -dimethyl- cis -crotonamide dimethyl phosphate), phosphamidon, trichlorfon, and toxaphene plus DDT to 1-acre plots of cotton for control of the cotton fleahopper, Psallus seriatus (Reuter). The populations of spiders were more adversely affected by toxaphene plus DDT and Azodrin than by the other materiafs. Trichlorfon was less injurious to insect predators. In plots treated with trichlorfon, infestation of bollworms and tobacco budworms was lower and the resulting smaller amount of damage to squares (floral buds) and bolls resulted in a greater yield of seed cotton.
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