Bean leaf mold disease mainly affects leaves, stems and pods. At the beginning of the disease, purple-brown spots are formed on the leaves and leaves. When enlarged, polygonal brown spots are formed. When the humidity is high, gray-black mold layer is formed on the back of the lesions. The spotted surface of the sonic coal-like mold can cause early defoliation when the disease is serious, leaving only the top young leaves, the diseased leaves become smaller, and the pods of the diseased plants are greatly reduced.
Prevention:
1. Deeply plough the land before planting, apply enough base fertilizer, use the tree general to disinfect the soil, and use the new high-fat film for seed dressing to isolate the insects and insects in the ground and improve the emergence rate.
2, the flower bud differentiation period of the bean buds promotes Huawang No. 3, inhibits the prolongation of the main shoots, promotes the differentiation of flower buds, manages the water and fertilizer, increases the application of decomposed organic fertilizer, phosphorus and potassium fertilizer, etc., ensuring sufficient nutrients for the beans and robust plants. Improve disease resistance.
3, timely inspection, found that the diseased plant timely spraying targeted drugs plus new high-fat film, effectively improve the prevention and treatment effect.
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