Evaluation of 26 insecticides for armyworm Mythimna separata (Walker) control [Philippines]
1985
Basilio, R.P. | Mochida, O. (Internationl Rice Research Inst., Los Banos, Laguna (Philippines). Entomology Dept.)
Rice is sporadically damaged by M. separata larvae, which attack rice at all growth stages but are most damaging during heading, when they cut rice panicles. Insecticides with a high knockdown effect control this insect best. Of the 26 insecticides, 17 caused 100% mortality in contact toxicity tests, 13 caused more than 80% mortality in foliar spray tests, and 12 caused 10% defoliation. High mortality did not necessarily correlate with low defoliation. Twelve insecticides were highly promising and four (U57770, RH 0994, MTI 500, and MTI 220) were potentially promising. Cypermethrin killed insects and prohibited larvae from feeding
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