“四叶合剂”的配方制作和使用方法是:用按树叶4公斤,麻柳叶3公斤,苦楝叶2公斤,烟叶0.5公斤,水4公斤,将四叶切碎,投入锅里煮半小时,滤渣澄清后即成“四叶合剂”原液。每公斤原液对水30公斤喷雾,即可防治各种害虫,特别是治蚜虫和菜青虫有特效.不妨试一试。上海市南汇县书院乡李雪村李正飞 “Four leaves mixture” recipe production and use method is: press the leaves 4 kg, 3 kg of mahogany leaves, 2 kg of neem leaves, leaves 0.5 kg, 4 kg of water, the four leaves chopped into the pot and cook for half an hour , After the residue is clarified into a “four-leaf mixture” stock solution. Each kilogram of liquid spray 30 kilograms of water, you can control a variety of pests, especially the treatment of aphids and Pieris have effects. Shanghai Nanhui County College Li Xuecun Li Zhengfei