Copper sulfate is a kind of protective agent firstly. It has a protective effect before the onset of vegetables. It can not only quickly kill bacteria but also stimulate wound healing. At the same time, copper sulfate can also activate certain soil nutrients, increase crop nutrition and stimulate growth. Therefore, copper sulfate is a rare broad-spectrum germicidal growth promoter.

At present, in the vegetable production in greenhouses, especially under continuous cropping, farmers' friends are increasingly scratching their heads about the root diseases of vegetables. With copper sulfate for prevention and treatment, the effect is better. The specific use method is:

1. Use 30 kg of copper sulfate per hectare, add 11 kg of ammonium bicarbonate, grind it and mix it, and put it into a complete plastic bag. Seal it for 24 hours, which is copper ammonium preparation. Before planting, spread evenly into the planting ditch or hole.

2. After planting and easing seedlings, the above-mentioned agent (ammonium ammonium preparation) is dissolved and poured into the water, in combination with a sapling seedling water.

3. Water the roots of the crop with a 500-fold solution of copper sulphate and use 250 grams of liquid per strain.

4. 75 kg of copper sulphate per hectare, dissolved into the vegetable field with water. The use of copper sulphate has a comparative effect on resistant pathogens such as Verticillium wilt, cucumber fusarium wilt, pepper blight, tomato bacterial wilt, and pepper blight, which survive on crop residues or in the soil for 6-8 years. Good control effect, its efficacy can last 12-16 months.

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