Effect of chlorpyrifos and methyl chlorpyrifos on controlling rice leaffolder(Cnaphalocrocis medinal

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<正> Rice leaffolder (Cnaphalocrocis medinalis Guenee)has become a serious pest on rice in Jiangsu Province.The insect appeared in Jul and remained until Sep. A field trial with 5 treatments and three replications was laid out in a randomized complet
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