一、试验目的为了探求22.5%氟腈·哒嗪水乳剂防治水稻稻飞虱的防治效果适宜用量。二、试验条件1.试验对象、作物和品种的选择试验对象水稻稻飞虱(Nilaparuata lugens Cstal)。试验作物水稻,品种金优402。2.环境条件所有试验小区的栽培条件均匀一致水稻长势较好,去年稻飞虱为害较重,是一块有代表的田块。且应与当地的农业实践相一致。三、试验设计和安排 First, the purpose of the experiment In order to explore 22.5% fluoronitrile pyridazine water emulsion control of rice planthopper appropriate dosage. Second, the test conditions 1. The test object, crop and variety of choice Test object Rice planthopper (Nilaparuata lugens Cstal). Experimental crop Rice, variety Jinyou 402.2. Environmental conditions All test plots of the same uniform cultivation conditions Rice grow well last year, planthopper more serious damage, is a representative of the plots. It should be consistent with local agricultural practices. Third, the experimental design and arrangement