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怎样自制波尔多液?波尔多液是防治果树、蔬菜病害的农药之一。自制波尔多液必须掌握以下几点:一、正确的配制方法:要把全量水的一半稀释硫酸铜,另一半水调制石灰乳,然后同时倒入第三容器内,边倒边搅拌。切忌把石灰乳倒入硫酸铜溶液中。二、按照要求的原料比例准确用量:一般常用比例是硫酸铜:石灰:水为1:2 :200。三、要现配现用,不可过夜,使用时还要搅拌,以防沉淀。四、波尔多液的质量与原料质量关系密切:硫酸铜要磨细,石灰要选择烧透的块灰。当波尔多液喷到菌体表面后,铜离子进入菌体细胞内部,破坏病原菌体内的蛋白质,使病菌死亡。如果波尔多液放入铁桶以后,硫酸铜就被铁还原成金属铜,而铁则变成硫酸亚铁溶解到水里,这样一来,既腐蚀了铁桶,更降低了药效,所以波尔多液不能在铁桶中配制和存放。
How to make Bordeaux mixture? Bordeaux mixture is one of the pesticides to control fruit trees and vegetable diseases. Homemade Bordeaux mixture must master the following points: First, the correct preparation method: half of the total amount of water to dilute the copper sulfate, the other half of the water modulation of milk of lime, and then into the third container at the same time, while pouring edge stirring. Do not pour lime milk into copper sulfate solution. Second, the proportion of raw materials in accordance with the requirements of the exact amount: The common ratio is copper sulfate: lime: water 1: 2: 200. Third, to be with the current use, can not be overnight, but also use mixing, to prevent precipitation. Fourth, the quality of Bordeaux mixture of raw materials and the quality of the close: copper sulfate to be fine, lime to burn through the choice of block ash. When the Bordeaux mixture is sprayed onto the surface of the cell body, the copper ions enter the cell interior of the cell body, destroying the protein in the pathogen body and killing the germs. If the Bordeaux mixture into the iron drum, the copper sulfate is reduced to iron metal copper, iron becomes ferrous sulfate dissolved in water, so that both corrosion of the iron drum, but also reduces the efficacy, so Bordeaux Liquid can not be formulated and stored in metal drums.