Prevention and Control of Several Main Diseases of Spring Cabbage

It is time for cabbage to be planted on a large area. However, many vegetable farmers do not understand the management of cabbage and the prevention and treatment of diseases. The prevention and treatment are not timely. As a result, the incidence of cabbage is severe in the later period. Several common diseases and control methods of cabbage are introduced. as follows:

First of all, Chinese cabbage is prone to damping-off at the seedling stage, resulting in a lot of cotton-like white hyphae that causes the seedlings to fall flat and die. The prevention and control method uses seedling bacteria at the seedling stage to mix 50 kg of soil per bag and spread it on the ground as floating soil, or use a mixture of crust 500 times liquid to mix 72.2% propamocarb 750-1000 times for spray prevention.

Followed by downy mildew, it appeared pale green spots on the front of the leaves at the onset of disease, and then gradually expanded into yellow-brown. When the humidity was high, white mold grew on the back of the leaves, and the lesions appeared watery. The control can be used 500 times liquid shell mixture 72.2% propamocarb 750 times or 50% dimethomorph 1500 times liquid spray control, 7-10 days control once, continuous control 3 times.

The third is bacterial soft rot disease. The old leaf near the ground is the first to attack. When the leaves are on the path, there will be many small needle-like spots, which are flooded, and the lesions will rapidly expand and rot, with a very strong odor. Prevention and control methods, shellfish 500 times liquid mixing 72% agricultural streptomycin 3000 times and DT500 times, or 25% karustic zinc water 500 times liquid spray control, 8-10 days control once, continuous control 3 times .

The fourth is sclerotinia. In the condition of high humidity, white cotton-like mycelium grows on the surface of the diseased part, and when it is serious, black sclerotia are formed, which can easily cause rot and stem of the rot and poor development of the plant. The prevention and control method can be sprayed with 50% iprodione WP 1000 times solution or 35% carbendazim sulfonate suspension 800 times solution.

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