烟蚜是烟草生产上一大害虫,每年发生频繁,为害严重。1982年以前,防治烟蚜使用的是普通乐果。在烟草生长季节里,为了防治烟蚜为害,先后喷普通乐果5—6次,用药用工较多,开支大但效果不好。 1982年全部推广了新农药—氧化乐果防治烟蚜,既减少了农药费的开支,又节省了喷药的用工,而且有效期长达15—20天,防治效果十分显著。 Aphis is a major pest on tobacco production, which occurs frequently and severely every year. Before 1982, the control of tobacco aphids using the general dimethoate. In the tobacco growing season, in order to prevent the harm of the tobacco aphid, it has sprayed 5 to 6 times of the normal dimethoate. The medical and surgical work is more, the expenditure is large but the effect is not good. In 1982 all new pesticides - omethoate control aphids, both to reduce pesticide costs, but also save the spraying of labor, and the effective period of up to 15-20 days, the control effect is very significant.