2011•Horticulture & SeedRequires access
Control Effect of Four Pesticides on Cnaphalocrocis medinalis Guenee
Lin Bo-neng
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Abstract
[Objective] The aim was to select pesticides on controlling Cnaphalocrocis medinalis Guenee.[Method] With water as CK,the compared experiment on controlling Cnaphalocrocis medinalis Guenee was conducted by using 1.8% abamectin EC 450 g/hm2,40% chlorpyrifos EC 1 800 g/hm2,20% triazophos EC 1 800 g/hm2 and 40% phoxim EC 1 500 g/hm2.[Result] The control effects of 1.8% abamectin EC 450 g/hm2 and 40% chlorpyrifos EC 1 800 g/hm2 were 85.58% and 86.80%,and both the rate of insects in the curled leaf were 0.The control effect of 40% phoxim EC 1 500 g/hm2 was 79.60%,and the rate of insects in the curled leaf was 4.35%.The control effect of 20% triazophos EC 1 800 g/hm2 was the lowest,only 72.45%.[Conclusion] Four pesticides had control effect and the effects of 1.8% abamectin EC 450 g/hm2 and 40% chlorpyrifos EC 1 800 g/hm2 were best.