Quantitative Determination of Avermectins Residue in Polygonatum sibiricum Bioactivity of avermectins to Chilo suppressalis Walker and Cnaphalocrocis medinalis Guenée and the influence to natural enemies in the paddy fields TOXICITY CHARACTERISTICS OF AVERMECTINS TO COTTON BOLLWORM AND ITS EFFECTS ON THE TOXICITY OF OTHER INSECTICIDES


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