Summer cowpea refers to cowpea grown at a high temperature of 35 degrees during the harvest season. Due to the high temperature, small temperature difference, and heavy rainfall, the pods are easy to bulge and have serious pests and diseases. Therefore, cultivation techniques are different from spring. The cultivation goal is not to pursue high yield, but to have better commercialization and disease resistance, and the color of the strip is suitable for the consumer habits of the market. You should pay attention to the following links.
Main points of cultivation techniques of cowpea in summer
1. Variety selection:
On the basis of ensuring proper color and luster, high temperature without bulging seeds, and strong disease resistance, try to choose abundant products.
2. Fertilizing the site:
Apply 30kg three-element compound fertilizer per mu, 2 squares of decomposed organic fertilizer. When plowing the land, apply 7000g of 3% phoxim granules to control underground pests.
3. Sowing:
1.5kg per mu. The density is thinner than spring planting, planting 2800 holes per mu, 2-3 seeds per hole, planting two rows with a row spacing of 1.5m and a plant spacing of 30cm. Dried seeds are generally used for live broadcasting.
Four, seedling stage management:
The cultivation period in summer is very short, only about 20 days from emergence to vine rejection. The main points of management are disease prevention and fertilizer control. Generally, 40% of myclobutanil emulsifiable concentrate 40ml is used for root irrigation to prevent cowpea-based rot.
5. Climbing period management:
From vine drop to full frame management, water and fertilizer control is the main method, and the soil moisture content is maintained at 60-70%. Do not fertilize before climbing half a frame. Pay attention to prevent diseases and insect pests, generally use 20% Fenvalerate emulsifiable concentrate. In heavy rainfall, 80% carbendazim powder and other protective fungicides should be sprayed. When the plant growth point exceeds the pole, timely topping and topping.
6. Pod management:
1. Water and fertilizer management should keep up, especially nitrogen fertilizer should be fully applied. Generally, 10-15kg of urea is applied per mu, and it is applied 40cm away from the plant, and watering should be timely after application.
2. Reasonable and safe medication to prevent and control insect pests. It is forbidden to use highly toxic pesticides. Generally, high-efficiency and low-toxic pesticides are used, such as cypermethrin emulsifiable concentrate and fenvalerate emulsifiable concentrate.
3. Prevention and treatment of diseases. Mainly anthracnose, leaf spot and powdery mildew. Generally, 70% of thiophanate-methyl 700-800 times solution, 80% of mancozeb 800 times solution and other broad-spectrum fungicides, 15% powder rusting emulsifiable concentrate 1000 times solution are used to ensure that the medicine is sprayed after a rain.
4. Reasonable use of foliar fertilizer can make the pods more beautiful. Commonly used foliar fertilizers include biotin, strong harvest, Luba, etc.
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