Why do chili peppers drop flowers and fruits in spring?

Why do chili peppers drop flowers and fruits in spring? How to prevent pepper from falling flowers and fruits? Do not ask experienced netizens to help introduce that planting chili often causes pepper to drop flowers and fruits for various reasons, which leads to the yield of chili peppers. Therefore, the planting net has sorted out the causes and control methods of pepper falling flowers and fruits. The following is listed in detail for netizens' reference. First, due to the large temperature changes, in an unstable state, the flowering and fruit-setting period of hot pepper is easily affected by environmental conditions, resulting in falling flowers and fruits. Chili peppers like dry air and moist soil, such as high temperature (more than 35 degrees), which affects pollination, fertilization, or long overcast and rainy days, so that the light is insufficient and the temperature drops (less than 15 degrees). Will affect pollination and pollen tube elongation, leading to flower drop. Second, due to the drought of the soil, lack of water and large air evaporation, it will also inhibit the plant demand for fertilizer and water, resulting in falling flowers and fruits. Too much water and poor permeability hinder root respiration and growth, and even retting roots will cause falling flowers and fruits. Third, due to the application of too much or insufficient nitrogen fertilizer to pepper or lack of phosphorus and potassium, the application of fertilizer is unbalanced and the supply of various nutrients is not coordinated, which will lead to flower and fruit drop of pepper due to lack of nutrients or nutritional disorder. Fourth, due to pepper planting too dense, resulting in poor ventilation, insufficient light, weakened photosynthesis, poor development of male flowers, so that the flowers of the first and second layers are easy to fall off. Reason 5, caused by diseases and insect pests, such as pepper virus disease, anthracnose, leaf blight and so on, will cause falling flowers and fruits. There are tobacco green insects, cotton bollworm fruit decay, but also easy to cause fruit shedding. Methods: first, select disease-resistant pepper varieties, plant disease-free and insect-free pepper seedlings, do not hurt root and leaf seedlings, reasonably close planting, improve ventilation conditions, so that the plant has a good growth environment. Method 2. To strengthen the management of planting ground temperature and humidity, the ventilation rate should be increased during the flowering and fruiting stage, the greenhouse temperature should be maintained at 20-27 degrees during the day, and the night temperature can be ventilated day and night when the temperature is not lower than 15 degrees. Only with good ventilation can the plant grow vigorously and the fruit setting rate is high. Method 3. Strictly control fertilizer and water for pepper, apply fertilizer reasonably, and apply fertilizer without watering before setting fruit, so as to control vegetative growth and promote reproductive growth. When topdressing, we should apply more phosphorus and potassium fertilizer and reduce the amount of nitrogen fertilizer. Pepper enters the full flowering stage and fruit setting stage, and the fruit expands rapidly, which requires a large amount of nitrogen, phosphorus and potassium fertilizer. Method 4. Control the soil moisture of pepper planting land. Pepper generally requires air humidity of 55% to 65%, and soil moisture of about 15%. If it is higher than 18%, it will affect root development and plant growth, but the soil should be kept moist during the full fruit period. Methods 5. timely control of pepper diseases and insect pests; the main diseases of pepper are virus disease, anthrax, cotton rot and so on. Virus disease can also make the plant atrophy, can not branch growth, seriously affect the yield. As aphids can spread virus diseases should be controlled as soon as possible and eliminated in the spot stage, imidacloprid forest, dimethoate and dichlorvos can be used to control pupae, and pupae can be controlled by mothicide or stone sulfur mixture. Pepper virus disease can be sprayed with virus A, plant disease and so on. Other diseases can be controlled by Purek, Metalaxel, Sukeling, Prodnisone, Carbendazim, carbendazim, Methyl topiramate and so on. In addition to the above measures, hormone treatment can also be used, such as 2pyrine 4murD or anti-falling hormone, can play a role in preventing falling flowers. What are the diseases of pepper seeds? how to increase the yield of hot pepper by planting?