Abstract: 【OBJECTIVE】Evaluating the safety of 14 insecticides in 7 groups to adults, nymphs and eggs of Cyrtohinus lividipennis (Reuter), an important predator of Nilaparvata lugens (Stål). 【METHOD】Toxic film method, rice spray method and rice stem dipping method were used to test the effect of insecticides on C. lividipennis under laboratory conditions. 【RESULTS】The results tested by toxic film method showed that fipronl, thiamethoxam and isoprocarb were unsafe to adults (Ⅳclass) , their LC50 values were 0.20-0.74 mg a.i./L, while silafluofen and etofenprox were safe to adults (Ⅰclass), and their LC50 values were＞160.0 mg a.i./L. Buprofezin was safe to adults of C. lividipennis (Ⅰclass) by rice spray method, caused only 1.7% mortality at 1day after treated, while carbosulfan, fipronil, thiamethoxam and imidapcloprid were moderate toxic or highly toxic to adults (Ⅲ or Ⅳ class), caused 70%-100% mortality at 4-10days after treated. The results tested by rice stem dipping method showed that tested insecticides were unsafe to nymphs of C. lividipennis except buprofezin and abamectin (Ⅳclass). The results tested by rice spray method explained that etofenprox, abamectin, silafluofen, dichorbos and buprofezin were safe to eggs of C. lividipennis (Ⅰclass), their hatching inhibition rate were lower than 20.0%, while carbosulfan were the most harmful insecticide to eggs of C. lividipennis, its hatching inhibition rate were 52.24% (Ⅲclass). 【CONCLUSION】IGRs buprofezin were safe to each stage of C. lividipennis, while effects of other tested insecticides was varied with insecticides and stages.

Key words: Cyrtohinus lividipennis (Reuter), Nilaparvata lugens (Stå, l), natural enemies, insecticides, safety evaluation