The control methods of mustard tuberculosis have the following points:
Tuberculosis, the disease almost infects all cruciferous plants, of which the long handle mustard (green vegetables), Arabidopsis (children), Chinese cabbage, Chinese cabbage, radish is the most serious, cabbage (lotus white) Cauliflower (cauliflower) has a slightly milder incidence. Winter mustard is more serious due to its relatively high temperature during the seedling period and after a certain period of time after colonization. Root tuber disease occurs in mustard, and soil moisture is a major cause. Especially after the planting of the mustard, it happens that the temperature of the soil tillage layer is longer than 8 °C for a long time, which aggravates the disease, and the drainage is timely and the soil moisture content is small. Be light. Secondly, studies have shown that the slightly acidic soil with a pH between 6.3 and 6.8 is the most serious. The pH value above 8.0 can inhibit the onset of the disease, and the PH value is above 9.0. In addition, the application of a large amount of acidic superphosphate in the soil will aggravate the onset.
Control method of mustard tuberculosis:
1. Seed disinfection. Seeds were soaked in water for 2 hours before sowing, then soaked in 100 times formaldehyde for 20 minutes, and then washed with water.
2. Seedbed selection and disinfection. Select the field where the mustard and cabbage and cabbage vegetables were not cultivated for the first 3 years. When making the seedbed, apply 150 kg of lime per acre before the preparation of the soil. After the soil preparation, it should be poured with 100 times of formaldehyde and covered with plastic film for 7-10 days. Proper tillage, sowing after 3 days.
3. Field soil selection and soil improvement. Avoid the selection of low-lying, water-filled fields to cultivate mustard. Implemented for more than three years of rotation. It is recommended to combine the soil preparation and apply 100-150 kg of lime to adjust the pH of the cultivated layer soil and reduce the incidence of clubroot disease. Do a good job in clearing ditch drainage, stop the planting of diseased plants, and find that the diseased plants are removed and taken out of the field for destruction. The use of a large amount of superphosphate in the soil will aggravate the occurrence of the disease. Therefore, it is better to use a reasonable fertilizer, more organic fertilizer, and a phosphate fertilizer to use a neutral fertilizer.
4. Chemical control. At present, there are not many agents for controlling tuberculosis of tuberculosis, and it is difficult to control once a disease occurs. Therefore, it is mainly prevention in the prevention and treatment of tuberculosis. At present, some manufacturers on the market have introduced fertilizers with preventive functions, but the effects of the products need to be improved. There are also some research institutes that have prepared some therapeutic agents for prevention and treatment, and have achieved certain results. For example, 90% of the fungicides prepared by Chongqing Fuling Agricultural Science Institute have been root-treated during transplanting, which is better for preventing clubroot disease. effect. 50% thiophanate-methyl WP 600 times solution, or 50% carbendazim WP 600 times solution, 72% chlorpyrifos cyanide-manganese-zinc WP 600 times solution, 72.2% creamer The water agent is filled with 600 times liquid.
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