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1.准确适时用药 棉铃虫防治应根据当地的虫情测报,结合棉田植株定期、定点调查,判断防治的最佳时期。春棉二代田间累计百株卵量200粒、三代80粒、四代100粒;夏棉百株累计卵量100粒,幼虫8～15头,是防治的最佳时期。而定期、定时防治法是最不科学的。 2.合理复配农药 要根据各种农药的机理合理复配,
1. Precise and timely medication Bollworm prevention and control should be based on the local insects measured, combined with cotton plants on a regular basis, sentinel surveys to determine the best period of prevention and treatment. The second generation of spring cotton field accumulated eggs 100, a generation of 80, four generations of 100; summer cotton 100 eggs accumulated 100, larvae 8 to 15, is the best time to control. The regular, regular prevention and control law is the most unscientific. 2. Reasonable compound pesticide should be based on a variety of pesticides reasonable mechanism of compounding,