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在防治稻飞虱的过程中应着重注意如下几点: 1.确定防治丘块 稻飞虱喜欢在温度适宜而湿度较高的禾苗基部取食,往往形成禾苗下部多,上部少、田中多,田边少等现象,而且分布不均匀,易给人以假象,不易掌握田间真实情况。因此,在进行药剂防治前应全面普查、逐丘鉴定,根据防冶标准确定药剂防治丘块。 2.选好对口农药 目前,防治稻飞虱的农药品种较多,扑虱灵是一种抑制昆虫生长发育的新型选择性杀虫剂,具有效果好、毒性低、药效长、成本低等优点。据试验,每667平方米用25％的扑虱灵可湿性粉剂25克对水75公斤进行粗水喷雾防治,5天后相对防效73.93％,15天后为80.47％,20天后达84.70％。在稻飞虱虫口密度大,虫龄较高的情况下,以使用25％仲丁威乳油为好。该药具有强烈触杀作用,一定的胃毒、熏蒸作用,杀卵作用和击倒力快等特点。
In the process of prevention and treatment of planthoppers should pay attention to the following points: 1. To determine the prevention of planthoppers Planthoppers like to eat at the base of the temperature and humidity of the higher grass seedlings tend to form the lower part of the seedlings more, less upper, Tanabe and other phenomena less, but unevenly distributed, easy to give people the illusion, not easy to grasp the real situation in the field. Therefore, prior to the prevention and treatment of pesticides should be fully census, mulberry identification, according to the prevention and treatment of elixir of chemical control to determine the block. 2. Select the right pesticide At present, the prevention and control of planthoppers more pesticide varieties, buprofam is a new insecticide that inhibits the growth and development of insects, with good effect, low toxicity, long drug efficacy, low cost advantage. According to the test, 75 kg of water was sprayed with 25 kg of propafen WP 25 kg per 667 m2 for rough water spray control. The relative control efficiency was 73.93% after 5 days, 80.47% after 15 days and 84.70% after 20 days. Rice planthopper density in the mouth, insect age is higher, the use of 25% sec-butyl Wei EC as well. The drug has a strong contact action, a certain stomach poisoning, fumigation, ovulation and knockout fast features.