The prevention and control methods for gray mold in the seedling stage of vegetables are as follows:
The vegetable gray mold pathogen mainly overwinteres in the soil. The bacteria are resistant to low temperatures, and spores are produced in large quantities at 7 ° C to 20 ° C, and are spread by air flow, watering and farming operations. The temperature in the seedling shed is 15 °C-23 °C, weak light, relative humidity above 90% or the water film on the surface of the seedling is the most susceptible to disease. In case of continuous rain or cold wind and windy weather, the wind is not timely, the density is too large, the seedlings are long, and the roots and wounds are transplanted when the seedlings are transplanted, which will aggravate the condition. Linyi Fertilizer Network Copyright
Control measures: Strengthen the management of the seedbed, do a good job of ventilation and drainage in the greenhouse, so that the relative humidity of the air does not exceed 65%; do not apply nitrogen fertilizer, increase the application of phosphorus, potassium fertilizer and light film fertilizer to cultivate strong seedlings, in order to improve the disease resistance of the plant itself. . Appropriate amount of water, rainy days or afternoons should not be watered to prevent freezing damage; remove the diseased seedlings, find that the gray mold disease seedlings should be removed in time, put them in plastic bags and carry them out of the shed, and spray a new high-fat film to form a layer. Protective film protection; in order to reduce the humidity inside the shed, try to use smoke fumigating. You can use Aurora brand sterilizing agent or a smoked spirit keeling agent, 250 grams per mu, and fumigation in the evening. Linyi Fertilizer Network Copyright
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