Autumn is the time when cabbage is sown, but diseases such as soft rot, dry heart, downy mildew, black spot, etc., affect the yield and quality of Chinese cabbage each year. This is a big problem for farmers. Most farmers spray only when they find a diseased plant. The result is often unsatisfactory. A drug can be used up to one week at a time, otherwise the disease will continue. As a result, farmers need to spray once a week for a growing season, and spray at least 3 times of medicines. This also takes time and money and causes a high residual drug. In fact, integrated control is the best prevention and control program. 1. Select varieties with good resistance and good quality. Try to select barrel type cabbage varieties represented by Beijing New No. 3 for strong disease resistance and good quality. 2. Land selection and ridge cultivation. Chinese cabbage is not tolerant to drought and is not tolerant to drought. High-humidity environment is very conducive to the production of soft rot, downy mildew and black spot. Sandy loams and drainage-water-convenient lands should be selected as far as possible, and ridge cultivation can significantly reduce disease occurrence. 3. Balanced fertilization is very important. Chinese cabbage is also hi potassium. About 50 kg of potassium sulfate NPK fertilizer is applied per acre as a base fertilizer. During the rosette stage, high-quality potassium nitrate is applied to cover nitrogen and potassium, and 15 kg of urea and 10 kg of potassium sulfate can also be applied per acre. Apply as much organic fertilizer as possible, but it must be fully decomposed organic fertilizer. 4. timely sowing. It is appropriate to delay the sowing period in the wrong development period and to avoid the period of high temperature and high humidity in the rosette period, which can significantly reduce the occurrence of diseases. 5. Seed treatment. Reduce the amount of bacteria, before sowing with 3% of the enzymatic wettable powder by seed weight of 1% seed dressing, or 40% bromide broth wettable powder, according to seed weight 0-3% seed dressing. 6. Spray pesticides in advance to prevent diseases. The Chinese cabbage was sprayed three times in a row after the seedlings were soaked, once every 7 days. The pharmaceutical agent may be selected from agricultural streptomycin, mesitectin, and 30% copper phthalocyanine ferric acid suspending agent to prevent bacterial diseases such as soft rot and black rot. 7. After the onset of spraying, remove the diseased plants. When a soft-rot diseased plant was found, the diseased plant was first taken out of the field and buried deeply, and immediately sprayed. For downy mildew, 72% of cream urea manganese zinc wettable powder, dimethomorph, etc. can be used. For the fungal diseases such as black spot and anthracnose, difenoconazole and myclobutanil can be used for dry fungus. Heartburn, you will need to spray the foliar fertilizer containing calcium plus zinc-iron-boron multi-element fertilizer, and even spray twice. Orp Electrode,Single-Junction Vitrified Orp Electrode,Platinum Orp Electrode,Platinum Combined Orp Electrode INESA Scientific Instrument Co., Ltd , https://www.inesarex.com