草地螟成虫产卵行为及中耕除草灭卵控害作用研究

A study on the oviposition behavior of adult Loxostege sticticalis and control effect of inter-tillage and weeding on its eggs.

草地螟成虫产卵对植物有明显的选择性。通过多年来田间调查和分析,杂草是草地螟成虫产卵首选寄主,其中以藜科、蓼科、菊科等的杂草落卵量多、落卵比率大,禾本科的狗尾草和稗草也是草地螟成虫主要产卵寄主,一些作物上草地螟成虫也产卵。通过及早和适时采取中耕除草能起到理想的避(灭)卵作用,对减轻草地螟为害程度可起到理想的控害作用。

Oviposition of adult Loxostege sticticalis had obvious selectivity towards plants. Through many years field investigations and analysis, it was found that weeds were the first choice hosts for oviposition by the adults of L. sticticalis. Weeds like Chenopodiaceae, Polygonaceae and Compositae had large egg amount and egg ratio. In addition, Green bristlegrass and cockspur of Gramineae were also main hosts for the oviposition of adults, so were some crops. Early or timely inter-tillage and weeding were ideal ways to avoid oviposition, as a result, alleviating the damage of L. sticticalis.