上高县是以三化螟为主的稻区,常年一、二代为害早稻较轻,三、四代为害晚稻较重。1965年在防治早稻第一代螟害战役中,由于农药不能满足需要,于是采取了挑治枯心团的办法。其作法是:在三化螟卵块盛孵后5-7天,即幼虫处于一、二龄阶段,受害禾苗心叶枯萎呈死绿色时,用药土挑治(6％可湿性666粉一份拌半干湿细土25份)。用药量视田间虫口密度和枯心苗多少而定,凡每亩卵块在50个左右、枯心率在1％左右者,用药土1.52斤,即666粉6-8钱;卵块大于 Shanggao County is a rice borer dominated by three borers, perennial one or two generations of early rice damage, three or four generations of late rice heavier. In 1965 in the battle against the first generation of early rice borer, because of pesticides can not meet the needs, then adopted a solution to the problem. The practice is: in the borer eggs after 5 to 7 days of incubation, that larvae in the first and second stage, the victim seedling leaves withered dead green death, the use of soil pick (6% WP 666 mixed Half wet and dry fine soil 25). The dosage depends on the field of insect population density and the number of seedlings may be, where the egg mass per acre in 50 or so, the heart rate of about 1%, with soil 1.52 pounds, or 666 powder 6-8 money; eggs larger than