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榆林地区是粘虫2代常发区,每年发生面积约100万亩,对小麦、玉米、谷子、水稻等作物危害较大。陕北榆林春麦区粘虫的有利防治期与小麦成熟期仅隔20天左右,使用有机氯等化学农药对小麦籽粒和茎秆污染严重,影响人畜安全,国家已停止生产。为寻求防治粘虫高效低毒的新药剂,我们于1982—83年用灭幼脲1、3号,对2代粘虫进行了防治试验示范。灭幼脲1、3号是一种昆虫激素,能抑制昆虫表皮几丁质的形成,使昆虫不能正常脱皮或变态而死亡;能抑制卵内胚胎发育,使虫卵不能正常孵化;对昆虫生殖力有抑制作用。灭幼脲1号由吉林农科院提供25％可湿性
Yulin area is the 2nd generation of Mythimna separata Walker, with an annual area of about 1000000 acres, the wheat, corn, millet, rice and other crops more harmful. The favorable control period of armyworm in Yulin spring barley area of northern Shaanxi is only about 20 days later than the mature period of wheat. Chemical pesticides such as organochlorine are used to pollute wheat grains and stalks, affecting the safety of human and livestock. The state has stopped production. In order to find a new agent for the prevention and control of armyworm with high efficiency and low toxicity, we tested the second generation armyworm in 1982-83 with diflubenzuron-1,3. Exuberant urea 1,3 is an insect hormone, can inhibit the formation of insect epidermal chitin, so that insects can not be normal peeling or metamorphosis and death; can inhibit the development of eggs in the embryo, the eggs can not be normal hatch; insects reproductive Force inhibition. Chlorbenzuron No.1 was provided by Jilin Academy of Agricultural Sciences with 25% wettability