玉米蚜虫近年发生频繁,为害有逐渐加重的趋势。由于玉米植株较高,种植较密,以及蚜虫多分布于植株顶部等原因,使玉米蚜的防治较为困难。为了在短期内控制蚜虫为害,我们在前几年试验的基础上,1990年全县大面积推广了毒砂法防治玉米蚜虫。实践证明,毒砂法确是防治玉米蚜虫的好方法。 做法是:每亩用40％或50％乐果乳油75—100克,加0.5—1.0 In recent years, maize aphids occur frequently, and the damage tends to increase gradually. Due to the higher corn plants, planting more dense, and the aphids are mostly distributed in the top of plants and other reasons, so that the prevention and treatment of corn aphid more difficult. In order to control aphids in the short term damage, we based on a few years ago the test, the county in 1990 to promote a large area of ​​arsenopyrite control corn aphids. Practice has proved that arsenopyrite method is indeed a good way to prevent corn aphids. Approach is: 40% or 50% per acre of dimethoate 75-100 grams, plus 0.5-1.0