Sweet potato hollow symptoms and preventive measures:
1. Reasonable rotation for changing, effectively reducing stem nematodes. Deep planting before planting, exposure for 3-4 days, and disinfection with soil disinfection, can effectively reduce the residual bacteria in the soil, laying a good foundation for sweet potato yield.
2. Select the disease-free and disease-resistant varieties, use the new high-fat membrane seed dressing before planting, and dry them before planting. It can repel underground pests, isolate viral infections, increase the rate of sweet potato emergence, and make seedlings robust.
3, regular inspections, found that stem nematodes damage the timely spraying of chemicals. Diseased plants, diseased leaves, etc. are taken out of the field for destruction, and the whole garden is sprayed with trees to disinfect the generals, which can effectively reduce the source of the bacteria.
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