In the winter and spring, the seasonal alternation, the grey mold in the vegetable shed began to ravage. With the growth and development of the leeks, the condition gradually worsened, and can continue until the end of April in the next year, severe reduction of production by 20% to 30%, and diseased leaves It is often accompanied by musty taste, which degrades quality. Its prevention and control methods are: selection of disease-resistant varieties such as Huang Miao, Keshi No. 1, Zhonglu No. 2, Xuelu and so on. The use of non-drip film, timely release, reduce the humidity within the greenhouse, timely removal of the diseased leaves buried or burned. In the early stage of disease, 50% carbendazim WP may be sprayed with 500 times, or 70% thiophanate-methyl 800 times, or 50% Polydoxifen WP 1000 times, or 50% acetaminophen wettable. Powder 1500 phlegm liquid, 40-50 kg per mu of liquid, spraying once every 5 to 7 days, and even spray 2 or 3 times. Note alternate medication. In case of cloudy days, it is best to use Chlorothalonil or Sulfonamide as a smoke suppressant.
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