In the fall, the temperature is lowered and precipitation is also high. Affected by this environment, the cultivation of shed vegetables in autumn is often unfavorable due to temperature and humidity, and there are series of symptoms. Experts remind farmers to pay attention to the following diseases and take measures to prevent and treat them as soon as possible.
Seedling roots
If the ground temperature of vegetables is lower than 15°C for several days in a row, the amount of watering is large or long-term and rainy, the temperature of the seedbed is low, and the time for the seedlings to regenerate is long, the rooting phenomenon will occur. In the seedlings with seedling rooting, the above-ground leaves gradually appeared yellow-green or milky white from the bottom, and the leaf margins began to scorch, and the growth was extremely slow. Can be increased by applying organic fertilizer, biological organic fertilizer dragging points, the amount of watering, leaf spray humic acid foliar fertilizer and other ways to prevent.
Leaf filling
During the growth of shed vegetables, if the air in the enclosed shed is high in humidity and the transpiration of the leaves is inhibited, the water absorbed by the roots and the moisture in the leaf cells cannot evaporate, and the water spots on the leaves may appear as downy mildew. Bacterial angular spot. If it lasts for a long time, the bubble patches will be blunt and the leaves will be green and will gradually turn brownish-brown with dead spots. By increasing the temperature in the shed, reasonably venting and dehumidifying, spraying the antifreeze on the blades, strengthening the insulation measures, adopting the method of early pulling and covering the straw curtain, and setting indoor temperature conditions, etc.
Climate discomfort
In the fall, the lighting time is shortened, and the temperature and light in the greenhouse cannot meet the normal growth needs of the shed. In the event of disaster weather, low temperature and low temperature, sudden drop in ground temperature, roots are inhibited, the vegetative growth potential is weakened, the middle and lower stems have a phenomenon of leggy, the upper stem thins, the leaves become smaller, the tendrils are weaker, and the cucumber “head†appears bent. Or the blades are compact and cause no results when severe. Prevention should be based on the preserving temperature, can be opened Shallow ditch coating, or cover 3-4 cm wheatgrass, take micro-irrigation measures, can prevent sudden drop in temperature, reduce the damage to the root system.
Improper ventilation
If the shed vegetables planted in the autumn are neglected for ventilation and humidity management, the shed vegetables will appear wilting and grow slowly. Management should pay attention to wind and humidity, the air release time, usually around 9 o'clock in the morning every morning, let go for half an hour and cover at night. In the wind and at the same time we must pay attention to scientific fertilization, to restore the weakness of shed vegetables, fertilization to take "a small number of times" approach to chase or hole application of quick-effect fertilizer, but also to grasp the shed temperature, reduce the shed inside the harmful gas is too concentrated.
Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshihealths.com