There are many reasons for falling sweet peppers in summer. The distribution of diseases and insect pests, and the occurrence of high temperature or fertilizer, improper use of drugs, etc., can cause bell peppers to fall and fall.
First, the temperature causes If the temperature is too high (above 35 °C), due to poor flower development or stigma lead to poor fertilization and fertilization caused by falling. In addition, the high temperature on summer nights makes the plants prone to excessive growth. During the day, it is possible to reduce the temperature in the shed by pouring mud, etc., and open the vents at night to reduce the night temperature. The flowering temperature is controlled at 20°C~27°C during the day and 15°C~20°C at night.
Second, nutritional reasons Sweet pepper growth requires adequate photosynthetic products and fertilizer. Dry soil and lack of water will inhibit the absorption of fertilizer and water by plants and cause fruit drop and fruit drop. Excessive water content, poor soil permeability, impeded root respiration, growth and development, and even rooting, can cause flowering and fruit loss. It is best to keep the soil dry. In addition, the application of fertilizer to nutrient comprehensive, to NPK combined application, excessive or insufficient nitrogen fertilizer or phosphorus and potassium deficiency, due to its lack of nutrients or malnutrition caused by falling. The special reminder is that after the sweet pepper enters the result period, the amount of potassium needs to increase rapidly, which is about twice that of nitrogen. Therefore, the use of potash must be emphasized in the result period.
Third, pests and diseases and drug causes Viral disease is the number one killer of sweet peppers in summer, after the virus infection, often plant atrophy or death phenomenon, resulting in falling flowers. In response to this situation, we must first eliminate the source of infectious virus disease, can be used imidacloprid, a net and other prevention and control can also be combined with the spraying of virus A, Ningnanmycin and so on.
In addition, the summer temperatures are high, and the concentration of pharmaceutical agents should be correspondingly lower in order to avoid phytotoxicity.
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