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实践证明,利用化肥或有机肥防治农作物病虫害,经济、安全、有效,且不伤害天敌、不污染环境,可谓一举多得,值得推广。1.氮肥:①碳酸氢铵等铵态氮肥,对害虫具有一定的刺激、腐蚀和熏蒸作用,尤其对红蜘蛛、蚜虫、蓟马等体形小、耐力弱的害虫,效果更好。施用方法:用1%碳酸氢铵溶液均匀喷雾,每隔5～7天喷1次,连喷2～3次。②尿素具有破坏昆虫几丁质的作用,用尿素、洗衣粉、水铵以
Practice has proved that the use of chemical fertilizers or organic fertilizers to prevent crop pests and diseases, economic, safe and effective, and does not hurt natural enemies, do not pollute the environment, can serve multiple purposes, worth promoting. 1. Nitrogen fertilizer: ① ammonium bicarbonate and other ammonium nitrogen fertilizer, the pest has some stimulation, corrosion and fumigation, especially for red spider, aphids, thrips and other small size, weak endurance pests, the better. Application method: 1% ammonium bicarbonate solution spray evenly, every 5 to 7 days spray 1, even spray 2 to 3 times. ② urea has the role of damaging insect chitin, with urea, detergent, water to ammonium