生产上，果农常配制和使用波尔多液方法不当，影响防效。配药中存在的问题有：①先配成浓缩液再加水稀释，结果形成沉淀或结晶而影响质量；②倒药的顺序不明确；③将浓硫酸铜液倒入石灰水中，有沉淀析出，配制的波尔多液不稳定；④用金属容器溶解硫酸铜或配制药液，严重影响质 Production, fruit farmers often use improper method of preparation and Bordeaux, affecting control. The problems in the pharmaceutical are as follows: firstly, it is dubbed as concentrated liquid and then diluted with water to result in the formation of precipitate or crystallization, which will affect the quality; the sequence of pouring is not clear; pour the concentrated copper sulfate solution into lime water and precipitate to prepare Bordeaux liquid instability; ④ with a metal container dissolved copper sulfate or formulated liquid, seriously affecting the quality