In September, the planting period of solanaceous vegetables in greenhouses is appropriate. The planting period of eggplant and pepper is from late August to early September, and the sowing date for tomatoes and sweet peppers is in mid-September. When growing seedlings, attention must be paid to: (1) Using a plastic greenhouse to raise seedlings, roll up the apron membrane in the greenhouse to cool it down. When it is sunny in high temperature, it is necessary to cover the shade net from 10 am to 3 pm to prevent high temperature injury. (2) Before sowing and transplanting, use pesticides such as phoxim and rosin to spray seedbeds to prevent and control underground pests. (3) The watering of the seedbed should be carried out in the morning. It must be watered in time to keep the soil moist. Drip irrigation is best. At the same time, the growth rate of vegetable seedlings is faster, and it is necessary to prevent leggy seedlings and tall seedlings. (4) When the seedling grows to 2 leaves and 1 heart, it is necessary to transplant the seedlings in time. The transplanting seedlings should be carried out on a cloudy day or after 3 pm. It is necessary to pour enough root water. After transplanting, the seedlings were covered with shade nets for 2-3 days to ensure their survival.
How to prevent cabbage black spot
Symptoms of the leaves are mostly from the outer leaves. The lesions are gray-brown and round in shape. They are 2 to 6 cm in diameter, and obvious concentric ring patterns can be seen on the larger lesions, and black moldy objects can be seen on the lesions. Severe disease can damage the petioles and form fusiform lesions along the petioles.
Control method 1 selection of disease-resistant varieties. 2 seed disinfection. In order to reduce the seed colonization, seed dressings with 40% dry weight of 50% omeprazole WP can be used, or soaked in warm water at 50°C for 20 minutes. 3 strengthen the cultivation and management. Rotate with non-cruciferous vegetables, increase organic fertilizer and phosphorus and potassium fertilizers, avoid partial nitrogen fertilizer, and increase plant resistance; strengthen water management, timely drainage and dehumidification, and improve ventilation conditions. 4 chemical control. In the early stage of disease, when one or two lesions appeared on the average of each plant in the field, spraying control began, spraying once every 7~10 days, and spraying 3 times continuously. More effective agents are: 40% WP 400 to 600 times, 50% WP 800 to 1000 times, 70% EB Zn wettable 500 times, 58% methosulfame Wettable powder 500 times.
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