波尔多液对多种蔬菜病害有较好的防治效果,且使用成本低,效果好,但使用不当也会产生药害,轻则减产,重则造成蔬菜死亡。因此,使用波尔多液应注意以下问题。一、不同的蔬菜种类和生育阶段,应使用不同浓度的药液。蔬菜上使用波尔多液的浓度,一般为一份硫酸铜、一份生石灰、200份水 Bordeaux mixture of a variety of vegetable diseases have a better control effect, and the use of low cost, good effect, but also use improper use of phytotoxicity, ranging from reduced production, while causing vegetables die. Therefore, the use of Bordeaux mixture should pay attention to the following questions. First, different types of vegetables and fertility stage, should use different concentrations of liquid. The concentration of Bordeaux mixture used on vegetables is generally one part of copper sulphate, one part of quick lime, 200 parts of water