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1 成虫防治防治关键在于抓住发蛾盛期进行用药,在8月1～10日开始选择重茬或距上年豆茬较近的豆田地块,固定四点、垅长50米,每天下午四时以后用木棍拨动大豆植株,发现蛾量成倍增长,并有成群蛾飞翔,即为成虫出现盛期,此时用药是防治最佳时期,其防治方法是: (1)药剂熏蒸:选用5%甲拌磷颗粒剂与砂子或煤灰做载体混拌药和载体按1:8比例混拌均匀后撒施,每隔四垅放一行,每五步放一堆,每亩用5%甲拌磷0.6～0.7公
1 adult prevention and control of the key lies in grasping the peak moth period for medication, August 1 to 10 began to select crop or near the bean stubble last year, the land plots, fixed four o’clock, 50 meters long, every day at four When the latter with a stick toggle soybeans plants, found that the amount of moth doubled, and flocks of moths fly, that is, the emergence of adult period, when the drug is the best time to prevent and control, and its prevention and treatment are: (1) drug fumigation : Select 5% phorate granules and sand or coal ash as carrier Mixing agent and carrier mixed evenly according to the ratio of 1: 8, spread every four 垅 put a row, put a bunch of five steps, per mu 5% phorate 0.6 ~ 0.7 male