桑橙瘿蚊生物学特性及防治技术研究

桑橙瘿蚊在江苏盐城地区一年发生5—6代,以2—5代为害严重。运用测报手段,在越冬代化蛹盛期每亩(1亩=1/15公顷)用50％辛硫磷或80％敌敌畏0.6公斤,拌适量干细土撒遍桑园;在各代初孵幼虫发生盛期,采用80％敌敌畏或40％乐果、50％辛硫磷配成1500倍液喷洒顶梢,有较高的防治效果。经过综合防治,可使各代虫情指数、全年综合虫情指数均控制在10％以下。

STUDIES ON BIOLOGICAL CHARACTERS AND CONTROL OF DIPLOSIS MORI YOKOYAMA

In Yancheng area,each year mulberry shoot gall-midge (Diplosis mori Yokoyama) occurs five to six generations, in which the generations from F2 to F5 are seriously injurious. Using test method,it can be controlled well by spraying per mu(one mu is 1/15 ha) 0. 6Kg of Dhoxim 50% or DDVP 80% with just the right amount of dry fine soil all over mulberry garden and spraying the top of mulberry with DDVP 80% 1 500×or Dhoxim 50% 1 500×or Dimethoate 40% 1 500×at the full hatching period of eggs of each generation. After the synthetical control , both the insect index of each generation and the synthetical index of each year can be kept below 10%.