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What medicine is used for rotten roots of Chinese cabbage?
Root rot of Chinese cabbage is a common disease, which is caused by many reasons, including the root rot caused by physiological diseases such as retting and soft rot. This has a lot to do with too much rain, high soil humidity and high temperature. Chinese cabbage is a cool vegetable, and the suitable growth temperature is 10℃ ~ 22℃. It is not heat-resistant. When the temperature exceeds 32℃, photosynthesis is weakened, respiration is enhanced, and its growth is very weak.

The rot of Chinese cabbage is mainly caused by Fusarium wilt and soft rot. There are some differences in medication between these two diseases:

1. Fusarium wilt: at the initial stage of the disease, spray 75% chlorothalonil wettable powder 600 times, 60% antiviral alum wettable powder 500 times, or 72.2% acaricide 600-800 times, and spray every 7- 10 days/time.

2. Soft rot: First, timely control aphids, cabbage caterpillars, diamondback moths and underground pests. The second is to spray 3000~4000 times of 72% agricultural streptomycin on the leaves at the beginning of the disease, focusing on the diseased plants and surrounding plants, paying attention to spraying the petiole and stem base near the ground. When the condition is serious, 700 times Dixon solution can be used to irrigate the roots.

In order to control the root rot of Chinese cabbage, 72% ciprofloxacin 1000 times solution or 400 times solution of 15% hymexazol was used to irrigate the roots or spray the roots and surrounding soil at the early stage of the disease.

Chinese cabbage should pay attention to different pest control in different growth periods.

At the seedling stage, it is necessary to strengthen the prevention and control of aphids, prevent the spread of viruses and eliminate pests such as Pieris rapae. Check the condition frequently, and use chemical drugs to prevent it in time after discovery.

During the rosette period, we should continue to control pests and completely eliminate aphids, cabbage caterpillars and moth larvae. We should strengthen the inspection and prevention of diseases.

It is necessary to strengthen the inspection and prevention of pests and diseases during the fruiting period, focusing on the prevention and control of downy mildew, black spot, soft rot and black rot, and continue to pay attention to the elimination and control of aphids, moth larvae and other pests.