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自从推广杂水稻以来,二化螟在许多地区普遍上升,在某些地方的发生量超历史纪录。为了提供预测预报的科学依据,1978—1981年在长沙对杂交水稻和常规水稻二化螟的越冬代同时测定了幼虫、蛹的体重。测定结果表明,在杂交稻中的二化螟的体重均高于常规稻中的二化螟的体重(一般幼虫的体重高出7.84—26.02%、蛹重高出7.76—20.64%)。由此而引起雌雄性比,雌蛾抱卵量、幼虫的死亡率均有明显差异。
Chilo suppressalis has generally risen in many areas since the introduction of miscellaneous rice and in some places it has exceeded historical records. In order to provide the scientific basis for forecasting and forecasting, the larvae and pupae body weight of both crossed rice and conventional striped stem borer, Chilo suppressalis, were determined simultaneously in Changsha from 1978 to 1981. The results showed that the body weight of the striped stem borer (Chilo suppressalis) in hybrid rice was higher than that of conventional rice (average body weight of larvae was 7.84-26.02%, and that of pupa was 7.76-20.64%). The resulting ratio of male and female, the amount of eggs held by the female moth, larvae mortality were significantly different.