不同种赤眼蜂对齐齐哈尔地区水稻二化螟的防治效果

Control Effect with Different Kinds of Trichogramma Against Chilo suppressalis in Qiqihar Area

为选择齐齐哈尔地区优势赤眼蜂蜂种防治水稻二化螟,对齐齐哈尔地区不同种赤眼蜂寄生水稻二化螟的能力进行研究,并对其防治效果进行了调查。结果表明:稻螟赤眼蜂对水稻二化螟卵粒的寄生率最高,防治田虫伤株率最低、防效最高。松毛虫赤眼蜂防治水稻二化螟的各项防治指标略低于稻螟赤眼蜂,但是数值之间差异不显著。螟黄赤眼蜂防治水稻二化螟的防治效果较差。由此可见,稻螟赤眼蜂为寄生水稻二化螟的优势蜂种。

In order to select the advantage Trichogramma against Chilo suppressalis in Qigihar area,the ability of different Trichogramma species against Chilo suppressalis in Qigihar area was researched and the control effect was investigated. The results showed that Trichogramma japonicum parasitic eggs of Chilo suppressalis was the highest,the rate of plant insect injury was the lowest,and control effect was the highest . The control index of Trichogramma dendrolimi was slightly lower than that of Trichogramma japonicum ,but had no sig- nificant difference between values. Trichogramma chilonis had poor control effect. Thus, Trichogramma japonlicum was the dominant species for Chilo suppressalis.