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(一)农业防治 1.铲草杀虫,减少越冬虫源 稻瘿蚊只危害水稻,在野生杂草方面寄主也不多,只有野生稻和游草。根据其寄主单一的特点,我们可以在冬季清田翻冬时把所有田边杂草铲除干净,把它的越冬场所破坏。这样便可以达到减少越冬虫源的目的。 2.改进耕作,切断过渡桥梁 稻瘿蚊在秋季末即以幼虫在寄主上越冬.时间长达150多天之久。由此可知,其成虫活动初期是4月中旬,在双秀稻地区这个时候它要危害早稻已是很困难的,只是危害中稻,它的大发生时间正值晚稻播插季节。其寄主单
(A) of agricultural control 1 shovel insecticide to reduce overwintering insect rice gall midge only endanger the rice, wild weeds in the host is not much, only wild rice and grass. According to the unique characteristics of its host, we can eradicate all the Tanabata weeds in the winter when the fields turn over the winter and destroy the overwintering sites. This will achieve the purpose of reducing the source of overwintering insects. 2. To improve farming, cut off the transition bridge rice gall midge larvae in winter at the host overwinter, as long as more than 150 days long. It can be seen that its early stage of adult activity is in mid-April. At this time Shuangxiu paddy, it is very difficult for it to endanger the early rice, but only endanger the middle-season rice. Its occurrence time is coinciding with the sowing season of late rice. Its host single