What are copper sulfate and lime used for pesticides?
Different plant species and growth stages should be used at different concentrations of liquid medicine. The use of Bordeaux concentration on vegetables, usually a copper sulfate a lime, 200 water. Melons are sensitive to lime. One copper sulfate, 0.5 lime and 200 water should be used. The vegetables in the seedling stage of the weak adaptability of Bordeaux, use should also be appropriate to reduce the concentration.
Bordeaux long duration, widely used in a variety of diseases of vegetables and fruit trees, cotton, hemp, on Downy Mildew and anthracnose, especially late blight of potato leaf disease effect etc.. It is the longest bactericide used in history.
The effective components of Bordeaux alkali copper sulfate, which can effectively prevent the spore germination, prevent fungal infection, and can promote the green leaf color, strong growth, improve tree resistance. However, Bordeaux itself has no bactericidal effect, when it is sprayed on the surface of plants, due to its adhesion and is adsorbed on the surface of crops. While plants can secrete acidic liquid in the process of acid The new supersedes the old., plus the invading bacteria in plant cells when secretion, make a small amount of copper sulfate into copper sulfate soluble in Bordeaux, resulting in a small amount of copper ions (Cu2+, Cu2+) into the cell, the cell protein in solidification. At the same time, Cu2+ can destroy certain enzymes in its cells, so that the metabolism of bacteria can not be normal. Under these two kinds of influence, namely can cause the bacterial poisoning to die.
By copper sulfate, lime and water in a certain proportion of a protective fungicide, called bordeaux.
