Through the mid-term management and guidance investigations of Dong Zhengjun and Yin Chunyu and the neighboring winter potato plots, the major diseases that have recently emerged are: late blight and ring rot. The main pests are locusts and small tigers. The guiding method for prevention and control is: Dong Zhengjun Hu potato In late blight, 75% chlorothalonil and 58% metalaxyl manganese zinc were sprayed alternately. Once every 10 days, they were sprayed once and sprayed 2-3 times; followed by ground tigers sprayed with 2.5% field dragon's milk. Chunyu household worms use 10% chlorfenacin, and the time of application is due to the high temperature and application after 4pm.
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