How to use copper sulfate on vegetables and cotton?

How to use copper sulfate in vegetable disease control

With the continuous improvement of people's living standards, vegetables have become indispensable food on people's tables. The quality of vegetables and the prevention and control of diseases are particularly important. Today, the editor will introduce to you a fungicide, copper sulfate.

Copper sulfate is a plant-protective inorganic fungicide. It can effectively prevent and control the disease when used before vegetables develop. It can quickly kill pathogenic bacteria when used in the early stages of the disease, and can also help damaged vegetable crops recover faster. In greenhouse production, especially under continuous cropping conditions, copper sulfate has good prevention and treatment effects on soil-borne vegetable root diseases. The following editor will introduce to you the effects of copper sulfate on different periods and diseases. Instructions.

1. During the vegetable planting period, copper sulfate and ammonium bicarbonate can be mixed and spread. Use 3-4 pounds of copper sulfate per acre, add 16-20 pounds of ammonium bicarbonate, mix well and let it sit for 12-20 hours. Sprinkling evenly into the planting ditch before customizing vegetables, and then planting vegetable seedlings can effectively prevent and control the occurrence of soil-borne diseases of vegetables.

2. After the vegetable seedlings are customized and slowed down, you can use copper-ammonium preparations to dissolve in water and wash them into the vegetable fields. You can also use copper sulfate directly to apply to the vegetable fields when watering the fields, or use 500 times the copper sulfate solution to irrigate the roots of vegetable crops. It can well prevent seedlings from dying due to soil-borne diseases.

3. In the early stage of vegetable disease in the field, use 500 kilograms of copper sulfate per kilogram of water for root irrigation, or use 100 times of copper sulfate to smear infected plants, which can effectively control the disease.

To treat cotton diseases, the pesticide basic copper sulfate should be selected

Medication in the seedling stage: After cotton is sown and covered with soil, pour 600 to 800 times of 27.12% basic copper sulfate suspension to disinfect the seedbed soil, which can effectively prevent soil-borne diseases. When the cotton seedlings have emerged and the cotyledons are flat, spray with 27.12% basic copper sulfate suspension 1000 times, which can effectively prevent and control seedling diseases such as cotton blight and anthracnose. 3 to 5 days before transplanting cotton seedlings, spray with 27.12% basic copper sulfate suspension 1000 times to ensure that the transplanted cotton seedlings are not infected with diseases and improve the transplant survival rate.

Medications used in the field period: Cotton Verticillium wilt is a soil-borne systemic disease. When the temperature and humidity are suitable, the pathogen is easy to infect and develop. After cotton seedlings become infected, spray 27.12% Basic Copper Sulfate Suspension 600-800 times in the early stages of the disease, and apply the drug again every 7-10 days. For plants with severe disease, the roots can be irrigated with 500 times of 27.12% basic copper sulfate suspension. Cotton angular spot is mostly caused by bacterial infection after flooding. In the early stage of the disease, spraying with 27.12% basic copper sulfate suspension 500 times can effectively control the spread of the disease.

Basic copper sulfate has no systemic properties and will not inhibit the growth of cotton plants due to excessive use. It has strong adsorption and permeability, and has a lasting effect of more than 20 days. Preventative effects are better if medication is taken early. The medicine has good miscibility and can be mixed with non-strong acid and strong alkali fungicides and insecticides. However, it cannot be mixed with domestic potassium dihydrogen phosphate. If necessary, it can be mixed with Nufarm Dolijia (high-content foliar potassium fertilizer). , and contain nitrogen, phosphorus and trace elements) or a mixture of high-quality foliar fertilizers and regulators.