为有效控制水稻穗期大螟的危害，笔者针对性地开展了不同药剂、喷液量和用药时间等田间试验示范。结果表明，氯虫苯甲酰胺、稻丰散、阿维·二嗪磷、阿维·三唑磷、阿维·杀螟松、乐果·三唑磷和唑磷·敌百虫等对大螟均具有理想的防治效果，可作为水稻穗期大螟的防治药剂。其中，氯虫苯甲酰胺和稻丰散不仅在大螟卵孵期使用效果好，而且对低龄幼虫的杀灭效果也较明显。在常规喷雾施药时，每hm2的喷液量以1000 kg较为适宜。大螟偏重发生时，宜在卵孵始盛与高峰期连续用药2次，必要时，在低龄幼虫高峰期或田间危害始见期，再复查补充用药1次。%Comparative experiment of pesticides, spray volume and control date were performed in the field in order to control the Sesamia inferens at rice panicle stage. The results showed that the control effects of several pesticides against sesamia inferens at rice panicle stage were good, including chlorantraniliprole, phenthoate, avermectins·diazinon, avermectins·triazophos, avermectins·sum-ithion, dimethoate·triazophos and triazophos·dipterex. Among these pesticides, chlorantraniliprole and phenthoate have obvious control effects at both egg hatching stage and low instar larvae stage. We suggest that the spray volume of water should be 1000 kg per hm 2. When Sesamia inferens occurred seriously, pesticides should be sprayed twice consecutively at the beginning and the peak period of egg hatching. If necessary, the pesticides should be sprayed at the peak period of low instar larvae.
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