1作用和使用对象不同波尔多液是一种良好的保护性杀菌剂,宜在病菌侵入寄主前施用,发病后施用仅有防止病菌再侵染的作用。波尔多液使用范围广,对由真菌引起的霜霉病、绵腐病、炭疽病、幼苗猝倒病等均有良好的防治效果,但对白粉病效果较差。对由细菌引起的溃疡病、角斑病等也有一 1 The role and use of different objects Bordeaux mixture is a good protective fungicide, should be used before the invasion of pathogens in the host application, the only application after the onset of the role of preventing bacteria reinfection. Bordeaux mixture with a wide range of uses, fungal-caused downy mildew, cotton rot, anthracnose, seedling damping off disease Dengjun have a good control effect, but the powdery mildew less effective. There are also one for ulcer disease, angular leaf spot caused by bacteria