巧制土农药──洗尿合剂用尿素和洗衣粉配制成“洗尿合剂”防治农作物蚜虫效果好。因为洗衣粉粘附展布力强，能将蚜虫的气孔封闭使蚜虫窒息死亡，尿素也有破坏蚜虫皮肤的作用。所以，配制“洗尿合剂”不但杀虫效率高、成本低，而且还有肥田的作用，适合广大农户采用。“洗... Coincidentally, the preparation of pesticides pesticides ─ ─ wash urine with urea and detergent formulated as a “wash urine mixture” to control crop aphids good effect. Because the washing powder adhesion spread strong, the aphids can close the stomata aphids suffocate, urea also has the effect of disrupting the skin of aphids. Therefore, the preparation of “wash urine mixture” not only insecticidal efficiency, low cost, but also the role of fertilizer, suitable for the majority of farmers. "wash...