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1.注意配制方法和浓度 配制波尔多液时,用80％的水溶解硫酸铜,20％的水溶解生石灰,然后把硫酸铜溶液慢慢地倒入石灰水中,边倒边搅拌,这样配成的波尔多液其沉淀速度较常规配制法要缓慢得多,从而可以提高防治效果和经济效益。果树因不同种类或同种不同生长阶段,对波尔多液的反应有差异,在配制和施药时要按各自的规定进行,如葡萄对石灰敏感,应配成石灰半量式;梨树对铜敏感,则应配制和使用石灰三倍式;而桃、李等核果类果树易造成药害,故应禁止使用。果树生长前期喷施浓度宜比后期低,如防治葡萄黑痘病,前期用240倍石灰半量式,后期可用180—200倍石灰半量式。
Note the preparation method and concentration Bordeaux mixture preparation, with 80% of the water dissolved copper sulfate, 20% of the water dissolved lime, and then the copper sulfate solution was slowly poured into the lime water, stirring while pouring, so dubbed Bordeaux mixture its precipitation speed is much slower than conventional preparation method, which can improve the prevention and control effects and economic benefits. Fruit tree due to different types or the same kind of different growth stages, the reaction of Bordeaux mixture differences in the preparation and application according to their own provisions, such as grapes are sensitive to lime, lime should be dubbed lime; pear-sensitive to copper , You should formulate and use lime triplicate; and peach, plum and other stone fruit trees are likely to cause injury, it should be prohibited. Spraying the fruit tree early growth should be lower than the late, such as the prevention and treatment of grape acne disease, with 240 times the previous half-lime type, late available 180-200 times the lime half-volume type.