Okra virus disease mostly occurs from the seedling stage to the early growth stage, and is mainly characterized by malformed mosaic and ecliptic necrotic spots. At the early stage of onset, the veins of the young leaves turn gloomy and soon turn into wrinkled and mosaic-shaped. Afterwards, the diseased leaves are thickened, the petiole and the internodes are shortened, the leaves are deformed, and the plants are dwarfed. The plants with relatively late onset only exhibited initial chlorosis on the leaves, and brownish etched necrotic spots and mild leaf shrinkage appeared later. After the infection, the growth of the plants is slow, and the flowering results are thin and small. When they are severe, they cannot bear fruit.
Control methods: cultivating strong seedlings, increasing base fertilizer, and applying topdressing phosphorus and potassium fertilizers after planting. During the dry season, pay attention to timely watering, so that the plants grow robustly and reduce the incidence. It is necessary to strengthen the control of aphids during the young plants. Timely removal of weeds in the field and around, severe disease as soon as possible to remove, reduce the transmission of drugs. At the early stage of disease, 5% sputum purpura WP can be used 400 to 500 times, or 20% morphine quinone·copper wettable powder 400 times, 15% phytosanitary WP 1000 times, mixed fatty acid water Emulsion 100 times to control 3 times, once every 7 to 10 days.
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