Low temperature has an adverse effect on the growth of vegetables, causing the flowers to fall and fall, the roots of autumn vegetables to rot, and the stem base to rot. In view of the above, the following suggestions are proposed:
Protective measures should be taken for exposed vegetables: 1. Strengthen field management to promote strong seedlings, cultivating and weeding to increase soil permeability; timely drainage after rain to prevent mites. 2. Spraying drugs in time to prevent the occurrence of diseases, you can use broad-spectrum fungicides such as chlorothalonil and carbendazim; pests can be controlled by insecticides such as phoxim and cypermethrin. 3. Harvest at the right time according to the weather conditions.
Protective measures should be taken to protect the vegetables: 1. Close the shed when it rains, prevent rain from entering the shed; release the wind in time after the rain stops; cool down and prevent the occurrence of physiological diseases.
2. Shed temperature management. Strengthen insulation and temporary warming measures, and add rain-proof and snow-proof plastic film on the straw curtain. Warming measures such as warm air furnace should be adopted at low temperature, and the temperature of the greenhouse should not be lower than 6 °C at night. When the temperature of the greenhouse is too high, a small wind should be placed. When the temperature is low, a temporary heating method such as an electric fan can be used to increase the temperature.
3. Shed room lighting management. In the current cloudy weather, the grass curtain must be uncovered during the day. In the case of cloudy weather, the grasshopper should be exposed as early as possible to increase the scattered light. Even the cloudy sky should use the reflective screen and the sun light to fill the light.
4. Fertilizer management. Watering should be minimized in the shed, and water should be poured when watering. It is best to use water-saving irrigation such as drip irrigation under the membrane or under-drip irrigation to reduce the humidity in the shed. On cloudy days, the leaves can be sprayed with 1%-3% sugar or 1% potassium dihydrogen phosphate to supplement the plant nutrition and improve resistance.
5. Prevent "flash seedling phenomenon". After the cloudy days are clear, prevent the plants from "flashing seedlings". After uncovering the haystacks on the morning after the cloudy day, pay attention to the changes in the plants. When the plants are found to be wilting, the method of releasing the wind and cooling should not be adopted, so that “flashing seedlings†will appear. The correct method is to find that the plants are wilting, put back some grasshoppers, and after the plants return to normal, uncover the grasshoppers. When the plants appear to be wilting again, pull back another part of the grasshoppers, and spray the nutrient solution on the plants to replenish the water of the plants. And nutrients, repeated several times until the plants return to normal.
6. Promptly control pests and diseases. Pay attention to the occurrence of pests and diseases, and use insect traps to prevent the occurrence of pests such as whitefly and mites. After the disease occurs, it is necessary to use dust or aerosol in time to prevent disease, and focus on strengthening the prevention and control of diseases such as gray mold and disease.
7. Plant management. Reasonable flower thinning and fruit removal, timely clearing the old leaf disease fruit in the field, reducing the nutritional burden of the plant, even avoiding pruning and snoring in the cloudy day, preventing viral infection and reducing disease occurrence.
8. Cold shed fruits and vegetables are harvested according to the situation.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Covid19 Pcr Kit,Sars-Cov-2 Test Kit,Sars-Cov-2 Pcr Test,Covid 19 Molecular Test
Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com