There are ways to manage vegetables in low temperature weather.

Low temperature has adverse effects on the growth of vegetables, resulting in falling flowers and fruits, root rot and stem base rot of autumn vegetables. In view of the above situation, the following suggestions are put forward:

? Protective measures should be taken for vegetables in open field:

1. Strengthen field management to promote strong seedlings, ploughing and weeding to increase soil permeability; timely drainage after rain to prevent and control waterlogging.

two。 To prevent the occurrence of diseases by spraying in time, broad-spectrum fungicides such as chlorothalonil and carbendazim can be selected, and insecticides such as phoxim and cypermethrin can be used to control pests.

3. Timely harvest according to weather conditions.

? Protective measures should be taken for vegetables in protected areas:

1. Close the shed entrance when it rains to prevent Rain Water from entering the shed; release air in time after the rain stops; cool down and drain humidity to prevent the occurrence of physiological diseases.

two。 Greenhouse temperature management. Strengthen heat preservation and temporary heating measures, and cover the grass curtain with rain-and snow-proof plastic film, low temperature should take heating measures such as air stove, the temperature of the shed should not be lower than 6 ℃ at night. Small wind should be released when the temperature of the shed is too high, and temporary heating measures such as electric fans can be used to increase the temperature when the temperature is low.

3. Greenhouse lighting management. In the current cloudy weather, the grass curtain must be opened during the day. In case of cloudy weather, the grass should be uncovered early and late as far as possible to increase scattered light, and even cloudy days should use reflective screens and sunlights to make up light.

4. Fertilizer and water management. Watering in the shed should be reduced as much as possible, and small water should be watered when watering is needed. It is best to use water-saving irrigation methods such as drip irrigation or furrow irrigation under plastic film to reduce humidity in the shed. In continuous cloudy days, the leaves can be sprayed with 1% Mel 3% sugar or 1% potassium dihydrogen phosphate to supplement plant nutrition and improve resistance.

5. Prevent the phenomenon of "flashing seedlings". After the cloudy day suddenly clears up, prevent the plant from "flashing seedlings". After opening the grass in the morning after continuous sunny days, pay attention to observe the changes of the plant, when it is found that the plant wilts, can not take the way of cooling, so there will be "flashing seedlings." The correct method is to find that the plant wilts, put back part of the grass, after the plant returns to normal, then uncover the grass, when the plant wilts again, pull back another part of the grass, and at the same time spray nutrient solution on the plant to replenish the water and nutrients of the plant. Repeat several times until the plant returns to normal.

6. Timely prevention and control of diseases and insect pests. Attention should be paid to the occurrence of diseases and insect pests, and trapping boards should be used in the shed to prevent the occurrence of white whitefly, aphids and other insect pests. After the occurrence of the disease, dust or aerosol should be used in time to prevent the disease, with emphasis on strengthening the prevention and control of diseases such as Botrytis cinerea and blight.

7. Plant management. Reasonable flower and fruit thinning, timely removal of old leaves and diseased fruit in the field, reduce the nutritional burden of plants, even cloudy days to avoid pruning and branching, prevent virus infection and reduce the occurrence of diseases.

8. Fruits and vegetables in the cold shed should be harvested according to the situation. Wu Yutai