How to Prevent Soft Rot of Chinese Cabbage
The bacteria that cause soft rot in Chinese cabbage are soft-rot bacterium. This bacterium is commonly found in soil and spreads by rainwater and irrigation water. The bacteria can only infect the disease when they come into contact with the cabbage wound. Different varieties of Chinese cabbage have different resistance to soft rot, and disease-resistant varieties can be used for control. The resistance of Chinese cabbage varieties to soft rot is consistent with the resistance to viral diseases and downy mildew. Therefore, based on the selection of disease-resistant varieties, we must grasp the following measures: 1) Cultivation of sorghum or ridge cultivation. This method has good drainage and air circulation, can reduce the humidity between the strains, and is conducive to wound healing. When water is applied (especially furrow irrigation), the soft rot bacteria in the water do not easily come into contact with the base of the cabbage leaf, thus avoiding infestation. It is also conducive to promoting the development of cabbage roots and improving the disease resistance of Chinese cabbage. 2) Do a good job of drainage and irrigation after the rain. After the rain, it must be drained in time so that no water can accumulate in the ground. Irrigation should be ground irrigation, balanced irrigation, change flood irrigation to shallow irrigation; change irrigation, string irrigation for long irrigation and short irrigation. Check carefully before each irrigation, and find that the soft-rot diseased plants have to be dug deep and buried. After pulling out the limestone, the soil is solid and then watered. 3) Reduce wound production and promote wound healing. Cabbage wounds often have mechanical wounds, lacerations, burns, injuries, and insect injuries. These wounds are a good way for bacterial invasion of soft rot. So try to reduce or avoid the occurrence of wounds. Therefore, after the cabbage is ridged, it is necessary to minimize unnecessary field operations or field movements, avoid mechanical damage, and prevent and cure diseases such as pre-viruses, downy mildew, and vitiligo in order to reduce lesions. When applying chemical fertilizers, pay attention to a certain distance from the root system to avoid burns. Keeping the water supply balanced to prevent the soil from drying out and causing the physiological rifts of the vegetables and leaves; from the seedling stage, it is necessary to prevent pests such as the ground tiger, cabbage caterpillar and cabbagewing moth in a timely manner, in particular to eliminate the damage of the mantle. The healing of wounds and the speed of healing of Chinese cabbage are related to the temperature, humidity and air circulation (mainly oxygen supply). Creating conditions of high temperature, low temperature, and air circulation can accelerate wound healing. 4) The prevention of soft rot should be based on prevention. To prevent and cure the disease that has already occurred, use streptomycin sulphate or streptomycin 1000--1300 times; or neophytin 1300 times for spraying; also use 50% dexamethasone 100 times; Or 70% of dexamethasone WP 800--1000 times; or 60% of bacteriostatic WP 500--600 times; or 40% of Bacteria (CT bactericide) 1 s (0.5g) of water 4kg Or antibacterial agent "401" 500 times. Focus on spraying soft rot disease strains and surrounding vegetables or petiole, so that liquid medicine flow into the heart of the cabbage, the better.