High temperature in summer, how to prevent pumpkin leaf burns?
When summer comes, melons in the nature reserve must be covered after rainy weather and in case of sunshine. We should distinguish similar diseases with high temperature and high humidity: We should also pay attention to distinguish the occurrence of diseases in children's daily management, because the symptoms of Prague pumpkin, low altitude dew and powdery dew are similar. Secondly, it is characterized by being opposite to the west of the sun and then gradually opening up. First of all, pay attention to shadows and cooling. In high temperature climate, shading nets should be set up on the terrain in the shed in time to reduce the light intensity in the shed. Please note that the sunshade net cannot be covered all day to avoid insufficient light in the shed and burning the growing point of pumpkin due to excessive temperature.
chlorothalonil and other drugs can also be used for prevention. Use disinfectants and other drugs for spray control one week before onset. The above is the damage caused by the high temperature of pumpkin moss. This situation mainly occurs in the outer layer of excessive pumpkin. Pumpkin lining is mainly based on available nitrogen fertilizer, with reasonable combination of nitrogen, phosphorus and potassium. After several days of persecution and sunshine in rainy days, if watermelon puree is burned, foliar fertilizer, such as brassinolite, can be sprayed to promote growth.
fungicides can be sprayed for water replenishment and fertilization. Spraying .2ppm brassinolide and foliar fertilizer, USAR brassinolide can improve the stress resistance of plants, and foliar fertilizer can quickly supplement the urgently needed nutrients of plants. Folding fertilizer can be used as an option. Abpkin powdery mildew mainly harms the leaves of plants. This disease is most likely to occur in hot and rainy summer. For this mildew powder, the most important thing is to correctly identify the symptoms, find the cause and remove the serious disease in time.
it's better to transplant again. After the injured node seedlings return to growth, they may be earlier than melons, and the back of the sheets is also covered with dense insects. It was found that the temperature was high and it rained before. In the environment of high temperature and high humidity, melon aphid occurs in pumpkin, which has a great influence on the growth of pumpkin. How to effectively prevent and control the high temperature and high humidity in summer, which makes the pumpkin epidemic more serious, leads to poor quality and low yield, and causes serious economic losses to melon producers. How to avoid and control it scientifically and for a long time?