According to the description, not powdery mildew but downy mildew disease, the downy mildew of pepper mainly damages the leaves, and petiole and tender stems can also be infected. Leaf lesions were slightly lighter green with irregular lesions. When severe, the leaves had a sparsely white thin moldy layer. The diseased leaves became brittle and thick, with slightly upward curling, and later leaves were easy to fall off. The petiole and tender stems were brownish-water stained, and the diseased part was also white and sparse.
The main difference between chillies downy mildew and powdery mildew: In the early stage of chillies downy mildew, the positive lesions on the leaves of pepper were light green. In the early stages of the infection with powdery mildew, the leaves of the diseased chillies appeared yellowish yellow spots on the front, and gradually expanded to the edges. The back green yellow mottled. When the damage is severe, downy mildew will form a sparse layer of white mold on the back of the leaves of the pepper. The diseased leaves will become brittle and thick and roll up. In the petiole, the disease is brownish. Powdery mildew forms a white powder on the back of the leaves of the pepper, not the moldy layer, and the spots are dense. When the powdery leaves are severe, the whole leaves turn yellow and fall off.
Control methods: Available 58% metalaxyl manganese zinc 600 times liquid + Jintai Long top dressing 600 times liquid or 72% cream urea and mad zinc 800 times liquid + agricultural energy 750 times liquid or 57% enoxirane zinc 1000 times Liquid + phlegm-effect 600 times liquid; alternate use, spraying once in 5-7 days, spraying 3-5 days in severe cases, can effectively control.
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Description:
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