网纹绵蚧寄生蜂调查及杀虫剂对寄生蜂影响研究

本文报道了发生在四川雅安的网纹绵蚧Ｃｈｌｏｒｏｐｕｌｖｉｎａｒｉａｐｏｌｙｇｏｎａｔａ（Ｃｏｃｋｅｒｅｌ）寄生蜂共有６种，其中以黑色软蚧蚜小蜂ＣｏｃｃｏｐｈａｇｕｓｙｏｓｈｉｄａｅＮａｋａｙａｍａ和白蜡虫花翅跳小蜂Ｍｉｃｒｏｔｅｒｙｓｅｒｉｃｅｒｉ为优势种群。寄生蜂对网纹绵蚧有较高的寄生率，４～５月中旬，对雌蚧寄生率达３６９％～４４７％，对雄蚧寄生率达２３％～８６２％。４种杀虫剂对寄生性天敌的毒性试验表明：氧化乐果和稻虱净对寄生蜂的毒性较小。

THE PARASITIC WASPS OF CHLOROPULVINARIAPOLYGONATA (COCKERELL) AND EFFECT OF SOMEINSECTICIDES ON THE NATURAL ENEMIES

There are six species of parasitic wasps of Chloropulvinaria polygonata (Cocrerell) in Yaan, Sichuan Province. The dominant populations are Coccophagus yoshidae Nakayama and Microterys ericeri Ishii. The parasitic rate of the females by these wasps reaches 36 9% to 44 7%, and that of the males is 2 3% to 8 62% from April to the middle of May, respectively. The test of toxicity of five kinds of insecticides on the parasitic wasps shows that the toxicity of Dimethoxidae and quinalphos on the natual enemies are lower than that of other insecticides.