Three Diseases of Chinese Cabbage
1. Soil preparation for sowing, reasonable rotation, timely removal of crop residue from previous crops, ploughing and drying as early as possible, clean gardens, deep plowing of fields, watering and flooding, and application of basic fertilizer (million to 5,000 kilograms of organic fertilizer with high quality decomposed, two phosphates) Ammonium 25 kg, potassium chloride 20 kg); timely sowing with new high-fat membrane dressing, sowing should be appropriate sowing, and the use of gingiva light to soak the topsoil, so that seeds sowed soil.
2. Seedling management, emergence Qi Qi, should be in the cotyledon stage, pull the cross period, 3-4 leaf stage of the seedlings, make up the seedlings, seedlings should be filled with seedlings in time after watering, top dressing (note nitrogen fertilizer content), to prevent the roots shaking due to the seedlings And wilting. The timely spraying of 800 times the new high-fat film can effectively prevent the invasion of bacteria, improve the ability of anti-natural disasters, improve the intensity of photosynthesis, so that healthy growth of seedlings.
3. Transplanting and planting, before transplanting, Daejeon should be irrigated with water and sufficient basal fertilizer should be applied (each mu is 1000 kg of decomposed cow dung, pay attention to the balance of nitrogen, phosphorus, and potassium in the soil), timely transplanting, reasonable dense planting, and planting Immediately water, and spray 800 times of new high-fat film timely (effectively prevent the ground water does not evaporate, seedling water does not transpiration, shorten the slow seedling period, can make the seedlings quickly adapt to the new environment) sooner or later every day, pouring water once, continuous 3 to 4 days.
4, field management, after the end of the seedling period, should be timely conservation tillage, watering topdressing (Acre 15-20 kg into the compound fertilizer, lotus stage can be applied 15-20 kg of urea, superphosphate 10 - 15 kg ), And with the application of new high-fat membrane 800 times, improve the utilization of fertilizer; in the Chinese cabbage spraying lotus stem can make plant stem thick, thick leaves, fresh leaves, plants lush, natural taste. At the same time, it can increase the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce the residual poisons.
5. Disease Prevention and Control: The three major diseases of Chinese cabbage are cabbage downy mildew, soft rot, and viral diseases.
Cabbage soft rot commonly known as "rotten gills", "rot disease", Streptomycin Sulfate or agricultural streptomycin + new high-fat membrane 800 times sprayed for prevention and treatment; virus disease is mainly transmitted by mites, as long as the control of aphids, Can effectively control the disease. It can be used to control and spray 800 times of the net + new high fat film. For those who have already begun to develop symptoms, they must remove the diseased plants in time and destroy them to control the source of the disease. The strong strains should be sprayed with 20% virus A500-700 times fluid, once every 5 to 7 days, and 2 to 3 times in succession. Downy mildew is a gas-borne disease that requires high humidity to occur and spread. Therefore, to prevent and treat the disease, the focus is on humidity control. In the early stage of disease, diseased leaves and central diseased plants are eliminated, and 68% of Jinlei, 72% of Kelu WP, 52.5% of fasting, or 40% of BDP can be used in a timely manner. The powder + new high-fat film is sprayed 800 times and sprayed before onset or early onset, once every 10 days for 2-3 consecutive times.