How to prevent and treat the yellow okra disease?
Okra epidemics have occurred throughout the growth period, and the incidence of the disease is heavy in the young period. It mainly invades young leaves, young shoots, tender stems, and tender pods. The seedlings became infected and fell down in water stains. They later rotted and produced a small amount of white mold on the diseased tissues. The young leaves were infected and they began to infect from the margins. The lesions showed water-stained dark green necrosis at the beginning of the lesion. They quickly expanded to form yellow to brown and brownish-brown necrotic large spots, nearly round to irregular, with a darker central color. The air-moist disease quickly rots and produces a small amount of white mold on its surface. Young shoots, tender stems, and tender pods become infected. Most of them are dark green to dark green, with water-stained necrosis. When wet, they rot and produce white mold on the surface of diseased tissues. Atrophy withered when dry. In the growing season, especially during the seedling stage and early growth stage, there is more rain and rainfall, or the terrain is low, the soil is heavy, or the nitrogenous fertilizer is seriously applied.
Control methods: Select a loam with high topography and well-drained loam. Fine soil preparation, high ridge or sorghum cultivation. Strengthen field management, timely drainage after rain, and avoid water accumulation in the fields. After the onset, the diseased leaves and seriously ill plants were removed in time. At the beginning of the disease, 72% of cymoxanil·manganese zinc wettable powder can be used 600 to 800 times, or 50% of lyophilizate wettable powder can be 600 to 800 times liquid, 72.2% of carbaryl wetting agent 600 to 800 times liquid, 69 % Dimethomorph Morpholine Manganese Zinc Wettable Powder 800 to 1000 times, 58% Metalaxyl Manganese Zinc Wettable Powder 500x, 64% Wexoraxine Wettable Powder 400x Liquid Spray Control, 10~15 Once a day, depending on the condition prevention 1 to 3 times.
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