螨死净对梨园两种害螨的田间防效

THE EFFECTIVENESS OF TESTS ON CHLOFENTEZINE FOR TWO LEAF MITS IN PEAR ORCHARD

1994年6～7月,在山东莱阳赤山,进行了螨死净等农药防治梨园山楂叶螨(Tetranychus vi-ennesis Zacher)和苹果全爪螨〔Panomychus ulmi(Roch)〕的田间药效试验。结果表明:药后虫口减退率,螨死净十三氯杀螨醇、速螨酮,7～25d在92％以上,灭扫利在86％以上,螨死净和阿波罗,10～30d为62～88％。药后的防效,螨死净十三氯杀螨醇、速螨酮7d达90％以上,并一直维持在95％以上,螨死净和阿波罗15d达90％以上,20d达95％以上,灭扫利7d达90％以上,15d后维持在95％以上。以螨死净十三氯杀螨醇最为经济有效。

During June to July, 1994, the field control effectiveness of tests on Chlofenlezine et al to Tetranychus viennesis Zacher and Panonychus ulmi [ (Roch)] had been evaluated in pear orchard, Chishan, Laiyang, Shandong. The results showed that the decreasing population density after applying miticide, Chlofeniezine+dicofol, Pyridaben, afier 7-25d were over 92% ; (上接第80页)Fenpropathrin was over 86%; Chlof entezine, Apollo were 62-88% during 10-30d, and the control effectiveness after applying miticide, Chlof entezine+dicofol, Pyridaben, afier 7d were-over 90%, and all were over 95%; Chlof entezine, Apollo were over 90% at 15d, and over 95% at 20d; Fenpropathrin was over 90% at 7d, after 15d all was over 95%. The best miticide was Chlof entezine+dicofol.