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近年来,我国螟虫危害特别严重,尤其是晚稻,因二化螟和三化螟危害损失惨重,有些晚稻因螟害引起的白穗率达10%以上。由于螟虫发生世代重叠,尽管农药没少打,可还是难以控制。可见,单靠农药防治难达目的,还须在冬季就采取农业防治措施:冬耕冻垡二化螟主要在稻蔸中越冬,也有在稻草、
In recent years, our country borers harm particularly serious, especially in late rice, due to the stem borer and the stem borer damage suffered heavy losses, some late rice caused by stem borer white spike rate of 10% or more. As stem borers overlap generations, even though pesticides are not less hit, it can be hard to control. Visible, rely on pesticide alone difficult to achieve the purpose of control, but also in the winter to take agricultural control measures: winter tilapia Borer mainly winters in rice straw, but also in straw,