绿颖及其混配剂对几种害虫的生物活性和联合作用测定

Activities of EnSpray,a petroleum spray oil, on insect pests and joint actions of its mixtures

测定了绿颖(农用矿物喷淋油)对几种害虫的生物活性及其混配剂的联合作用。结果表明,绿颖对柑桔红蜘蛛杀螨活性极高(致死中浓度LC50为14.11mg/L),对斜纹夜蛾、桃蚜、小菜蛾具有一定的生物活性(LC50分别为864.81,1152.66,3319.48mg/L),但对美洲斑潜蝇基本没有活性(LC50大于10000mg/L)。绿颖与阿维菌素混配,对柑桔红蜘蛛和小菜蛾具有明显的增效作用(共毒系数CTC分别达237～314和280～545),对美洲斑潜蝇则为相加作用(CTC为112～136);绿颖与吡虫啉混配,也能对桃蚜增效(CTC为172～259);绿颖与氟铃脲混配对斜纹夜蛾则为相加或增效作用(CTC为107～248)。

Activities of EnSpray, a petroleum spray oil, on some insect pests and joint actions of its mixtures were evaluated in the lab. The results show that EnSpray has a high efficiency on Panonychus citri with LC_(50) of 14.11 mg/L. It is a little effective on Pludenia litura,Myzus persicae,and Plutella xylostella, but no effect is found on Liriomyza sativae.When mixed with abamectin, co-toxicity coefficient (CTC) of EnSpray is 237-314 in P.citri,280-545 in P.xylostella, 112-136 in L.sativae, respectively. And CTC of EnSpray is 172-259 in M.persicae when mixed with imidacloprid and 107-248 in P.litura when mixed with hexaflumuron.