In winter, the greenhouse environment is low temperature and high humidity, and it is easy to cause botrytis cinerea in vegetables. It should be strengthened.

First, use a stencil net shed. The net amount of sclerotia and the duration of smoking are dependent on the crop. Tomatoes use 10% sclerotinum net smoke agent 250 grams, smoke 8 to 10 hours; beans and eggplants use 10% sclerotinum smoke agent 200 grams, smoke 6 to 8 hours.

Second, the drug spray. Use 50% ethylene nucleus 1000 times liquid or 50% iprodione 1000 times liquid spray, alternating medication. The combination of picking flowers and pharmaceutical sprays is better.

Again, regulate the temperature and humidity. The optimum temperature for the incidence of gray mold is 20~25°C, and the relative humidity is more than 90%. The temperature and humidity can prevent and control gray mold. When the relative humidity in the shed is high, try to increase the temperature of the greenhouse and create a temperature that is not conducive to the incidence of gray mold. The greenhouse humidity was reduced by pouring small water under the membrane and operating the rice straw to cover the straw.

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