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褐飞虱是单、后季稻穗期的主要害虫。我县主要以第四代为主害代,常年发生在9月中下旬到10月上旬。发生量大,为害面广,防治适期短,往往需发动大量劳力,采用各种机械动力进行大水泼浇、喷射和人工喷粉等方法突击防治,扑灭危害。但化工多、工效低,防治效果也不太稳定。1980年以来,我县试用东方红一
Nilaparvata lugens is a single, the main pest in the post-season rice heading stage. My county mainly to the fourth generation of victims, perennial occurred in late September to early October. Occurrence of large, damaging a wide range of short-term prevention and control, often require the mobilization of a large number of labor, using a variety of mechanical power for water sprinkling, spraying and artificial dusting and other methods of assault prevention and control, put out the hazards. However, many chemical, low efficiency, prevention and control effects are not stable. Since 1980, my county trial Dongfanghong one