In the sugarcane infected smut, there will be a black whip in the downward roll. The whip is covered with a silver-white film at the beginning of the formation, and then ruptured to release a large amount of black powder. Finally, only the heart column is left, resulting in a large reduction in sugar cane production. The initial infestation source of smut is the contaminated soil and the perennial diseased sugarcane. The pathogen causes a large amount of sugarcane infection by means of airflow, rainwater, irrigation water and insect transmission. Generally, the root-planting sugarcane field is heavier than the new planting sugarcane field, and the longer the perennial root age, the heavier the disease.
Prevention:
1. Carry out 2-3 years of rotation with rice, corn, sweet potato and other crops to reduce the source of smut disease in the soil. And select the varieties with strong disease resistance for cultivation, soaking seeds with the new high-fat membrane before the next species can greatly reduce the source of smut disease and increase the rate of sugarcane emergence.
2. Strengthen the field inspection and find that the infected plants should be removed before the black stalks are taken out, and the fields are burned out to reduce the source of smut infection. The whole park is sprayed with targeted chemicals for protection, and mixed with photosynthetic nutrient film fertilizer to help the sugar cane better absorb light energy and restore vitality as soon as possible.
3. When staying at the root, pay attention to the diseased field where the smut is infected, and the diseased plants and wreckage in the field should be burned intensively to reduce the residual smut disease in the field.
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