近两年来,稻飞虱(主要是褐飞虱,少量白背飞虱)在我县大发生。水稻受害后,轻者灌浆受阻,千粒重降低6—8克,重者水稻冒穿倒伏,提前枯死,减产40—100%不等。1980年我们进行了不同农药、不同施法试验,证明敌敌畏毒土法防效好而快,施药方便,残毒低。施药后24小时防效为91.6%,48小时后97.3%,96小时仍在95%。1981年全县推广20万亩,短期内扑灭了为害,约计挽回稻谷损失2,000万斤。 In the past two years, planthoppers (mainly brown planthopper, a small amount of white-backed planthopper) occurred in our county. After the victims of rice, the light grouting blocked, 1000-grain weight decreased 6-8 grams, heavy weight of the rice run through lodging, died early in advance, cut 40-100% range. In 1980, we conducted different pesticides and different spell tests to prove that the dichlorvos poisonous soil method is good and fast, with convenient pesticide application and low residue. At 24 hours after application, the control effect was 91.6%, 97.3% after 48 hours and 95% after 96 hours. In 1981, 200,000 mu was popularized in the county and put out in a short period of time, killing about 20 million jin of rice.