How does cabbage grow? Treatment of clubroot disease is easy
Recently, many farmers' friends said that cabbage has been treated with a kind of disease. Xiao Bian deliberately learned about it and asked for answers. The main manifestations of this disease are plant wilting, dwarfing, yellowing, convulsions and short, pulling out the plants, and found many small finger-like tumors in the roots, which is cruciferous vegetable clubroot disease. The disease is mainly a cruciferous vegetable such as Chinese cabbage, Chinese cabbage, Chinese cabbage, red cabbage, mustard, etc. It is a soil-borne disease. The main cause of the disease is swollen root sputum. The pathogen survives in the soil or adheres to the seed overwintering in the dormant sporangia. It can survive in the soil for more than 10 years. Therefore, if no measures are taken, the cruciferous vegetables will occur annually. And more and more serious. If the diseased plant (including the diseased root) is used for manure and is not treated by high temperature decomposing, the manure can also be carried by bacteria. In the next year, the field can often be spread by soil, seeds, seedlings or by means of rainwater, irrigation water, insects, fertilizers and farming operations. . It can also be spread by long-distance distance through the seeds and diseased plants. Relative humidity of 50% to 98%, soil water content of 70% to 90%, is most conducive to the germination of the dormant sporangia and zoospores and invasion of the host. When the soil pH is 5.4 to 6.5, it will be beneficial to the occurrence of the disease. The weather before and after planting has a great influence on the disease, such as the high incidence of rainfall after colonization or colonization in rainy days. In view of the above conditions of root swollen disease, vegetable farmers should pay great attention to the occurrence of root disease in vegetables. The specific method is as follows. (1) The sporadic diseased plants were immediately removed in the field, brought out of the ground and burned, and lime was disinfected around the diseased spots to prevent the spread of the bacteria. ⑵ early onset, use 53% mefenoxam MZ 500 times water dispersible granules, or 72.2% of Mixed propamocarb agent 50% WP 600 times thiram, carbendazim 50% WP 500 times solution, 15% defrosting agent 500 times solution, 96% methicillin powder 3000 times solution, 75% chlorothalonil WP 500 times solution, 60% pyraclostrobin, daisen water dispersion 1000 times solution of granules, 1500-2000 times solution of 10% cyanosin suspension, 1200 times solution of 50% chlorobromoisocyanuric acid soluble powder, 0.4-0.5 kg per plant, once every 10 days, even irrigation 3 Times. Other formulas can also be used to fill the roots, such as 25% metalaxyl WP 600-800 times liquid + 70% pentachloronitrobenzene wettable powder 600-800 times liquid, 72.2% frost-proof water agent 600-800 Double liquid + 70% sodium sulfonate soluble powder 400 ~ 600 times liquid, etc., depending on the condition of the disease 7 to 10 days of prevention and treatment once, 250 ~ 500 ml per hole. In addition, according to the feedback from the growers, the disease has been manifested before the transplanting, which may be seed-borne or seedbed soil. Therefore, it is recommended that during the planting process in the coming year, disinfection measures should be taken on the seeds, such as soaking seeds with 55 ° C warm soup for 20 minutes while stirring the seeds. Alternatively, soak for 15 minutes with a 0.4% potassium permanganate solution or soak for 20 minutes with 70% chlorothalonil WP 600 times. Among them, the effect of chlorothalonil is the best, followed by lime water. Some growers have discovered the first signs of root disease before transplanting, but they are still transplanted. This is not appropriate and needs to be highly valued. If the disease is found during transplanting, it must be Eliminate and pick up the seedlings. In addition, for the base cabbage, there are usually slight phytotoxicity and symptoms of calcium deficiency and boron deficiency. It is necessary to pay attention to the fact that the one-time mixed drug should not be too much, and pay attention to the time of administration, etc., when spraying, it can supplement the trace elements such as calcium and boron. leaven. Some growers think that this is a small problem when planting cruciferous vegetables. It is not a matter of heart. It may spread in the later stage. It is even more inappropriate. I hope that these can give some help to farmers. Tapioca Fiber,Tapioca Dextrin,Tapioca Dextrin Fiber,Indigestible Tapioca Dextrin,Low Sugar Tapioca Fiber Qingdao Bailong Huichuang Bio-tech Co., Ltd. , https://www.qdblcycn.com
