使用下列方法防治作物（蔬菜、水稻、果树等）病虫害，成本低，无污染，无残毒，效果好，有利于生产绿色产品、无公害蔬菜。一、红糖液。取红糖４００克，充分溶解于５００毫升水中，加酵母１０克，每２４小时搅动一次，放置２０天左右。当表面出现一层白膜时，加米醋和白... Use the following methods to prevent and control crops (vegetables, rice, fruit trees, etc.) pests and diseases, low cost, no pollution, no residue, good effect, conducive to the production of green products, pollution-free vegetables. First, the brown sugar solution. Take the brown sugar 400 grams, fully dissolved in 500 ml of water, add yeast 10 grams, stirring once every 24 hours, placed about 20 days. When the surface appears a white film, Garmisch vinegar and white ...