Viral disease is a common disease in the process of soybean planting. If it is not timely prevented, it will lead to severe reduction of soybean production and even rejection. This article will introduce in detail the prevention and treatment methods of soybean virus disease, for everyone to learn from the virus disease.
Soybean virus pathogen : Three diseases of soybean virus disease: 1 Soybean mosaic virus infects soybeans and causes soybean mosaic symptoms. 2 Cucumber mosaic virus causes symptoms of soybean atrophy and bean grain. 3 苜蓿 Mosaic virus causes mosaic symptoms of soybean leaves, which is characterized by distinct yellow markings. The three viruses that cause soy virus disease often infect soybeans at the same time. The symptoms in the field are often not single symptoms, but mixed symptoms.
Symptoms: The symptoms of viral diseases are invasive diseases of the whole system, and the symptoms of the diseased plants vary greatly. After the onset of spring soybeans, the upper leaves showed pale yellow-green mottled, the mesophyll showed a blister-like bulge along the veins, and then the mottled shrinkage became heavier and heavier, the leaves were deformed, the mesophyll was protruding, the leaf margin was rolled down, and the plant growth was significantly shorter. The number of pods is reduced, and the pods are flat and curved. After the onset of spring soybeans mature, the bean granules are significantly reduced, and can cause light brown markings on the beans.
Prevention:
1. Select disease-resistant varieties, establish disease-free seed fields, and use non-brown spots and full bean seeds as seeds.
2. Strengthen the management of fertilizer and water, cultivate robust plants and enhance disease resistance.
3, early control of aphids, from the beginning of the seedling stage to control the aphids to prevent and reduce the virus infection.
4, the use of chemical agents to control spring soybean virus disease should start from the seedling stage, in order to improve control. It can be combined with the prevention and treatment of aphids in seedling stage. The medicament may be selected from the group consisting of virus A, ningnanmycin, phytopathogenic, or bactericidal chlorpyrifos and gram gram gram, etc., according to the instructions, the dosage is continuously used 2-3 times, once every 10 days.
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