Five insecticides were tested in the laboratory for their effects on emergence of Diaeretiella rapae (M’Intosh) from mummified Myzus persicae (Sulzer). Diazinon was the most toxic insecticide followed in descending order by malathion, permethrin, methomyl, and acephate. Based on concentration/mortality regressions, recommended field rates of diazinon and malathion should inhibit emergence by 100 and 82%, respectively, while the remaining insecticides should have no adverse effects on emergence. At recommended field rates, acephate and permethrin significantly reduced survival of D. rapae adults for the first day after emergence, but methomyl did not. After the first day, acephate, permethrin, and methomyl had no significant effects on longevity and fecundity of surviving females.
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Hsieh et al. (1986) studied this question.
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