In all areas where soybeans are grown in China, blight will appear, causing large dead stagnation, which will greatly reduce the yield. The pathogen of blight can only harm the beans.
It is necessary to timely carry out pesticide control.
If the bean is infected with this disease, the usual symptoms are: gradually appearing during the seedling, causing the seedling to turn yellow and die. For the production field, the disease usually begins at the flowering stage, and the wilt disease develops rapidly from the stem base to the top of the crop, causing one side or the entire stem of the stem of the plant to appear dark brown, concave, and the stem vascular bundle is discolored. The veins of the disease-causing leaves turn brown, and the leaf flesh lie, which will then cause the entire leaves to dry out and fall off. The roots of the diseased plants are discolored and have fewer lateral roots. The number of pods in the plant was significantly reduced, and the back of the pod and the suture of the abdomen showed a yellow-brown color, and the whole plant gradually died. When acutely ill, blight develops from the stem base very quickly toward the top of the crop, eventually causing the whole plant to wither.
The Chinese Pesticide Network Xiaobian teaches you how to effectively cure the bean wilt disease:
First, according to the factors of production soil conditions, climate and other factors, choose to use disease-resistant varieties. For example, Qiu Kang 19, Chun Feng 2, Jiu Bai Bai, Jinzhou double season beans, etc. all have the ability to resist this disease.
Second, the practice of rotation with the onion and garlic or cabbage and other vegetables, should not be allowed to continue farming with cowpea.
Third, use sorghum for cultivation, scientifically carry out close planting, improve ventilation and ventilation; no matter the timing of watering, can be combined with irrigation and drainage; rational use of fertilizer, suitable increase of application of phosphate fertilizer and potash fertilizer, cultivation of strong healthy seedlings; if disease is found in the field When planting, the plant must be removed without any loss of time. After the harvest, the diseased tissue of the farmland should be cleaned up in time to reduce the source of bacteria in the second year.
Fourth, the seeds need to be treated before sowing. We can stir the seeds with 50% of the WP of carbendazim.
Fifth, the application of chemical pesticides for prevention and treatment. In the early stage of the disease, it is necessary to spray, focusing on the base of the stem of the plant. We can choose to apply 75 percent of the WP chlorothalonil 600 times solution, 50% of the fungicide thiophanate-methyl WP 500 times solution, 20% of the methyl group About 200 times of dry phosphorus emulsifiable concentrate, or 50% of WP carbendazim 500 times solution, 10% of double-effect hydrating agent 250 times liquid leaching root, about 250 ml per plant It is necessary to spray once every 10 days, and continue to rinsing 2 to 3 times.
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