由于第二代二化螟发生期较迟,双抢期间大部分不能羽化变蛾,因此,人们认为双抢对二化螟是一个致命的打击,双季稻区晚稻的二化螟防治就用不着多作考虑了。我县基本属纯双季稻区,晚稻苗期二化螟的危害很严重。1978年第三代 Because of the late occurrence of second generation stem borer, the majority of double-grab can not emerge moths, therefore, people think double grab on the stem borer is a deadly blow, double cropping rice in the late rice control stem borer on the useless For consideration. Basically, my county is a pure double cropping rice, late rice stem borer damage is very serious. The third generation in 1978