Celery virus disease is a common disease of celery, and celery virus disease is caused by cucumber mosaic virus infection.
1. The pathogenesis of celery virus disease
The virus overwinters on diseased residues in the soil, in the host, and on perennial crops. It can also be exposed to frictional spread by mites. High temperature, drought, and strong light are easy to induce viral diseases. Water shortage, lack of fertilizer, extensive management, and poor growth of plants are serious. Continuous cropping and intercropping with crops with high susceptibility to viral diseases are most common in the seedling stage.
2, prevention and treatment methods
1 Agricultural control There are no high-resistance varieties in the celery varieties, and the celery varieties with higher yield and disease resistance can be selected, and robust and disease-free plants can be selected for planting in areas where no viral diseases occur. Sowing at the right time, cultivating strong seedlings, strengthening field fertilizer and water management after planting, promoting root growth and development, and improving disease resistance of plants. Before planting, the susceptible plants are eliminated. In the high temperature and dry season in summer, seedlings should be shaded. During the whole growing season, attention should be paid to timely control of aphids.
2 chemical control can use O.1% potassium permanganate solution, or 20% virulence 1000 times solution, or antitoxin 700 times solution, or 5406 cytokinin 300 times solution, plus double effect 400 times solution, plus 20% of the mixed solution of potassium dihydrogen phosphate solution, once every 7 days in the early stage of the disease, continuous spraying 3-4 times; can also use 1.5% phytopathogenic 1000 times solution, in the seedling stage or early onset, prevention and treatment, interval 10-15d medication once, continuous spraying 3 to 5 times.
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