December vegetable production precautions
December is the month with the shortest hours of light in one year, with more winds and lower temperatures. Management should be based on changes in crop conditions and weather-based insulation, early dismantling grasshoppers, grasshoppers in the afternoon as early as possible, reduce ventilation time at noon. Try to keep the light for more than 6 to 8 hours and maintain the ground temperature above 16°C to meet the normal growth of overwintering tomatoes, cucumbers, peppers and other thermophilic crops. For crops with weak growth and late planting, Yunda 120+ Jinchunbao foliar fertilizer should be sprayed, sprayed once every 5 to 7 days, or combined with spraying to promote growth. The second is to strengthen the management of yin, fog, rain, and snow, and expedite the early exposing of grass cover as early as possible. As long as the temperature does not fall, more light must be released (scattered). The lowest temperature in the sheds is no lower than 8°C～10°C. If the temperature in the shed is too low, the grasshoppers will be covered with lids at noon, and the appropriate ventilation will be performed. It is necessary to put shades of grass and shade to prevent bad light from roasting bad seedlings.
Disease prevention and treatment: As the temperature decreases, the ventilation time decreases, the humidity in the greenhouse is high, cucumber downy mildew, disease, gray mold, bacterial angular spot; tomato late blight, gray mold, leaf mold; pepper disease, Diseases such as gray mold and leaf spot disease will occur. To take comprehensive measures, in the pouring water to select the cold flow after the sunny pouring small water, in the temperature management, daytime temperature control at 28 °C ~ 30 °C and then ventilated, is conducive to humidity and increase the temperature. Pharmacy should use broad-spectrum fungicide 50% Anke 1500 times or 43% Haolik 4000 times, or can kill 2000+ Yunda 120 diluted 1000 times, or agricultural streptomycin + 1200X, or Chlorothalon aerosol, quick-release aerosol spray 5 to 7 days once, or smoked once, alternating use of several pesticides to improve the control effect.
Sowing time and variety: The energy-saving solar greenhouse for planting two loquats can be grown in early December in spring and spring, with varieties such as Shuangfeng, Lulong, and Thai acne and other varieties. The varieties of beans have Liang 906, Fufeng, Zhizhuang 28-2; mid-cultivation cucumber varieties include Jinlu 3, Shengfeng 3, and Jinyou 30; Xihu varieties include Jinghu No. 1 and No. 3 and French fiber hand; After the powder, the century flour star, L402, Paul crown, gold shed, etc.; pepper has Jin green 21 (corn pepper), 9785, Chaoyan 15, Sujiao 5 and other varieties.
In the winter shed, a small shed is covered with multiple layers, or an electric heating line is added to increase the indoor temperature. In order to increase seed vigor, Jinfulai can dilute 50 to 100 times for soaking for 1 to 2 hours to improve seed resistance and low temperature resistance.
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