一、皂角树叶取鲜叶1.5公斤捣烂,加水1.5公斤过滤去渣,每公斤汁液加水4公斤喷雾,可防治棉蚜、红蜘蛛。二、苦楝树叶取鲜叶0.5公斤捣烂,加水3公斤浸泡半天,过滤去渣,取液喷雾,可防治棉蚜、红蜘蛛、菜青虫、菜螟、稻飞虱、稻叶蝉、稻蓟马等害虫。三、椿树叶取鲜叶0.5公斤切碎,加水10公斤,煮沸5分钟(或捣烂浸泡24小时),过滤去渣,每公斤滤液加水 First, saponins leaves take 1.5 kg of fresh leaves smashed, add water 1.5 kg filter to the residue, add 4 kg of water per kg of juice spray, can control cotton aphids, spider mites. Second, the neem leaves take 0.5 kg of fresh leaves smashed, add water, 3 kg soak for a long time, filtered to slag, liquid spray, can control cotton aphids, spider mites, cabbage beetles, rice planthoppers, planthoppers, rice leafhoppers, rice thrips Other pests. Third, toon leaves 0.5 kg chopped fresh leaves, add water 10 kg, boil for 5 minutes (or soaked for 24 hours), filtered to the residue, water per kg of filtrate