兼答河北读者李玉柱　　生产中普遍存在波尔多液配制和使用不合理的问题 ,表现在选料不严格 ,用劣质原料 ;用量不准确 ,随意加大量 ;配兑不科学 ,不讲究配兑顺序和使用器械 ;使用中图省事乱复配 ,不分树种和生长期一样喷用 ,以及不管有效使用期和随意加大药量等。常造成不应有 And readers in Hebei Li Yuzhu widespread production of Bordeaux mixture preparation and the use of unreasonable problems, the performance of the material is not strict, with poor quality raw materials; dosage is not accurate, arbitrarily increase the amount; with the unscientific, pay no attention to the order and use of the match Equipment; the use of plans in the chaos with the map, regardless of tree species and growth as the same spray, and regardless of the effective use of the period and increase the dose and so on. Often caused by no