稻水象甲Lissorhoptrus Oryzphilus Kuschel是我国检疫性水稻害虫,主要以幼虫食根致害。化学防治是该虫田间治理的主要途径,但由于其施药时间较早(一般在移栽后2周内),不利于稻田早期天敌群落的建立,故有必要探讨其它治理途径。在生物防治方面,国 Rice water weevil Lissorhoptrus Oryzphilus Kuschel is a quarantine pest in our country, which is mainly caused by larvae rooting. Chemical control is the main way to control the insect in the field. However, it is necessary to explore other ways of treatment because of its application time is earlier (usually within 2 weeks after transplanting) and not conducive to the establishment of natural enemies community in the early rice fields. In biological control, the country