用某些植物做农药防治作物害虫,成本低,无污染,对作物无药害,对人畜安全,且作用效果好,是一种值得推广的好办法。 一、苦楝 又名楝树、紫花树。其叶、树皮、种子均可做农药。配制方法是:取苦楝树叶2公斤,揉碎后加水5公斤,浸泡6小时,过滤去渣后成原液。每公斤原液加水8公斤稀释后叶面喷雾,亩用40公斤,可有效地防治水稻、玉米、谷子等作物的各种螟虫。也可以用苦楝树皮或果实 It is a good way to promote crop pests by using some plants as pesticides to control crop pests. The method has the advantages of low cost, no pollution, no phytotoxicity to crops, safety to human beings and animals, and good effect. First, Melia also known as neem, purple tree. Its leaves, bark, seeds can be pesticides. Preparation method is: take neem tree leaves 2 kg, crushed and add water 5 kg, soak for 6 hours, filtered to the residue after the original solution. Each kilogram of raw water plus 8 kg of diluted foliar spray, acres with 40 kg, which can effectively control rice, corn, millet and other crops a variety of stem borers. Neem bark or fruit can also be used