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波尔多液如果配制或使用不当,很容易产生药害,生产上应引起注意。1 药害原因1.1 配制波尔多液时,硫酸铜溶解不完全,连同药渣喷到果实上,会使果面出现红褐色药害斑点。1.2 苹果幼果期和果实临近成熟期使用,会造成果面锈斑,果皮粗糙,影响外观品质。1.3 桃、李、杏等核果类果树,生长季节对铜离子敏感,使用波尔多液易发生铜离子毒害,波尔多液中石灰量低于倍量式时,苹果(尤其是金冠品种)、山楂、柿树等易发生药害。1.4 波尔多液同石硫合剂、退菌特等混用,或交替使用间隔时间太短,均易产生药害。
Bordeaux mixture if improperly formulated or used, it is easy to produce phytotoxicity, should pay attention to the production. 1 phytotoxicity 1.1 Preparation of Bordeaux mixture, the dissolution of copper sulfate is not complete, together with the dregs sprayed on the fruit, the fruit will appear reddish-brown phytotoxic spots. 1.2 Apple young fruit and fruit near the maturity of the use, can cause fruit rust, rough skin, affecting the appearance of quality. 1.3 Peach, plum, apricot and other stone fruit trees, the growing season is sensitive to copper ions, the use of Bordeaux mixture prone to copper ions poisoning, Bordeaux mixture of lime is lower than the times of the amount of type, apple (especially Golden Delicious varieties) Trees and other prone to injury. 1.4 Bordeaux mixture with lime, the mixture of special top-off, or alternate use of too short intervals, are prone to injury.