Recently, affected by strong cold air, the potatoes grown in Guangxi have suffered freezing damage. After freezing damage to the potato, the potato has poor resistance to diseases and insects, and it is easily damaged by diseases such as blight, root rot, leaf spot, anthrax, aphids, whitefly, and spider mites, resulting in yellow leaves and rot Affect potato expansion and accumulation of starch, reduce production and reduce quality. Therefore, after the potato is frozen, pest control must be strengthened to protect the plants.
Specific prevention and control methods: After the cold air has passed, when the temperature rises, promptly spray 2-3 times of abamectin, 1000 times 20% imidacloprid, 1,000 times 80% chlorothalonil mixture, or 1,000 times 48% of the leaf surface. Chlorpyrifos, 1000-fold 3% acetamiprid, 1000-fold 80% thiophanate-methyl mixed solution, or 1000-fold 2.5% cyhalothrin, 1000-fold 10% nitenpyram, 1,000-fold 80% mancozeb The mixture was sprayed once every 7-10 days, and all the stems and leaves were evenly sprayed so that drops of water began to form. If we can add 1500 times of Shennongsu chelated fertilizer, 1000 times of natural brassin, and 1000 times of high-efficiency balanced nutrient solution, we can enhance the efficacy of sterilizing and disinfestation, improve the control effect, and enhance disease resistance. Insect resistance, but also from the foliage to add nutrients to speed up the freezing of plants to restore normal growth, promote potato enlargement and starch accumulation, increase production and quality.
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