Abstract
The impact of fenvalerate and American Cyanamid AC-222,705 [(±)-cyano(3-phenoxyphenyl)methyl(+)-4-(difluromethoxy)-α-(1-methylethyl)benzeneacetate)], both of which are pyrethroids, toxaphene + methyl parathion, and monocrotophos on arthropod predator populations in cotton was observed in 1978 and 1979. Two or more spray treatments of the pyrethroids at concentrations of 0.11 and 0.056 kg of AI/ha essentially eliminated most predator species. The toxaphene + methyl parathion and monocrotophos at recommended rates had the same effect on arthropod predator populations.
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