稻虱捻翅虫是我县稻飞虱的一种重要寄生性天敌,寄生于褐飞虱和白背飞虱成、若虫,被寄生的飞虱内部生殖系统受到阻碍,不能正常交配,失去有效的繁殖能力。一、稻虱捻翅虫寄生率根据我们于1989年7～9月在田间的捕虫调查,在本地区稻虱捻翅虫寄生率是比较高的,其中白背飞虱高于褐飞虱,后期高于前期,详见表1。 Bipolaris parasite is an important parasitic natural enemy of rice planthoppers in our county. Parasitism is caused by the brown planthopper and the white backed planthopper, nymphs. The internal reproductive system of the planthopper is hindered, and can not be mated normally and lose effective reproduction ability. First, the parasitic rate of Bipolaris parapsilosis According to our survey of insect traps in the field from July to September 1989, the parasitism rate of Bipolarasia is relatively high in this region, in which the white-backed planthopper is higher than that of the brown planthopper, In the early stage, see Table 1.