石硫合剂是防治果树病虫害的常用农药，可用来防治果树白粉病、锈病、黑星病、腐烂病褐斑病，以及红蜘蛛、介壳虫、黄粉蚜等分种病虫害。但是，不合理的使用不但效果差，而且还会造成药害、因此，用石硫合剂防治果树病虫害有“五忌”。 一忌配制后久置不用。配制好的石硫合剂最 Stone sulfur mixture is a common pest control pests and diseases of fruit trees, can be used to control fruit powdery mildew, rust, Scab, rot brown spot, and spider mite, scale insects, yellow aphids and other species of pests and diseases. However, unreasonable use not only results in poor results, but also causes phytotoxicity. Therefore, there are “five avoidance” measures to control pests and diseases of fruit trees with lime sulfur compounds. Avoid bogey after a long time set aside. Preparation of a good stone sulfur mixture most