利用肥料治虫,不仅方法简单,对人体无害,而且效果也比较好,现介绍四种“以肥灭虫”法。一、尿素、碳酸氢铵,氨水这三种氮素化肥都具有较强的挥发性,对红蜘蛛、蚜虫、螨虫等害虫都有刺激、腐蚀和熏蒸作用,有较好的防治效果。在害虫发生时,用2%的尿素溶液,或1%的碳酸铵榕液,或0.5%的氨水溶液,进行根外喷施,每隔六、七天喷一次,连喷2 The use of fertilizer pest control, not only simple, harmless to the human body, but the effect is relatively good, are now introduced four kinds of “fat pest control” method. First, urea, ammonium bicarbonate, ammonia These three nitrogen fertilizers have strong volatility, spider, aphids, mites and other pests have stimulated, corrosion and fumigation, have a better control effect. In the event of pests, with 2% urea solution, or 1% ammonium carbonate solution, or 0.5% ammonia solution, the root spray, every six or seven days spray once, and even spray 2