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Acephate effect on dryland and irrigated cowpeas when applied to thrips (Thysanoptera: Thripidae) and corn earworm (Lepidoptera: Noctuidae) control
- Sweeden, M.B., McLeod, P.J., Russell, W.R.
- Journal of economic entomology 1994 v.87 no.6 pp. 1627-1631
- Vigna unguiculata, Frankliniella fusca, Frankliniella tritici, Sericothrips variabilis, Helicoverpa zea, acephate, dryland farming, irrigated conditions, crop yield, Arkansas, Oklahoma
- Cowpeas grown under dry conditions had significantly higher yield increases following acephate insecticide application at or just before first bloom compared with those receiving other treatments. Yield responses to acephate were lower in fields with abundant moisture or irrigation than in dry fields. Acephate applications for thrips, Frankliniella fusca (Hinds), F. tritici (Fitch), and Neohydatothrips variabilis (Beach) (=Sericothrips variabilis [Beach]), control during early seedling stages resulted in less foliage insect damage. However, acephate applications to seedling stages did not result in yield increases. Corn earworm, Helicoverpa zea (Boddie), had little impact on yield in fields where earworms were monitored.