What harm will high temperature weather do to vegetables? What are the main solutions?

When the temperature is high in summer, some flowering vegetables will be burned by high temperature. Besides leaves, perianth will also be burned by high temperature, and stunted and fruited fruits will also appear deformed. If the flowering is not well developed, it will decline and reduce the yield. Vegetable diseases and insect pests are prone to occur in summer. Summer is mainly hot and rainy. In order to prevent pests and diseases, it is necessary to adjust the temperature and humidity. Rational close planting, scientific fertilization, improve plant disease resistance. After vegetable diseases and insect pests occur, the diseased plants should be removed in time, weeds in the field should be removed, and chemicals should be sprayed in a targeted manner to prevent the spread of diseases and insect pests. The adverse effect of high temperature on vegetable growth is the root cause of vegetable Qiu Guang. Except for several heat-resistant varieties such as white gourd, pumpkin, bitter gourd, pod and water spinach, most vegetables are heat-resistant. In midsummer, not only do you like to eat cold vegetables such as spinach, cabbage, radish and Dutch beans, but you can't grow hot vegetables such as tomatoes and peppers.

High temperature and rainy, high temperature and drought will lead to all kinds of diseases and insect pests, significantly reduce production, or even no harvest, which will aggravate the occurrence of autumn off-season. The temperature is above 30. If there is no rain or less rain, there may be soil drought and atmospheric drought. If the root system of vegetables can not meet the evaporation demand of plants, the leaves of vegetable plants will wrinkle and fall off, the quality will deteriorate, the yield will drop, and they will wither and die. High temperature and long sunshine increase the male and female differentiation of cucumber. When the flower eyes of tomato and pepper differentiate, there are few flowers and poor development at high temperature. The temperature or ground temperature is higher than the normal growth temperature range of vegetables and plants, which will make some disease-resistant varieties lose their disease resistance and aggravate the occurrence of diseases.

High temperature is often accompanied by strong light. Long-term intense sunlight on the fruits of eggplant, melon and other vegetables will burn both sides of the fruits by sunlight, which will lead to spot disease. High temperature and drought will adversely affect the flowering process of eggplant, beans and other vegetables, leading to falling flowers and fruits. Drought and water shortage are easy to cause navel rot of dried cabbage and tomato. In summer, leaves should be kept reasonably, and fruits should be hidden under leaves as far as possible to avoid direct sunlight. Therefore, when tomato vegetables do this kind of work at high temperature, they must avoid strong light and high temperature at noon, and it is best to choose after 3 pm. In addition, when eating vegetables formally in summer, the row spacing of stumps should be close, so that the stems and leaves can block each other and avoid direct sunlight on the fruits.