During the growth of pepper, due to the influence of adverse climate conditions such as low temperature and drought, it can cause long-term malnutrition of nutrients, resulting in the formation of stale fruit and malformed fruit, and a reduction of production by 30% to 60%. The reasons for the overwintering of peppers and their prevention methods are described below. First, the symptoms of deadlocked fruit Strange fruit is also called stone fruit, unisexual fruit or female fruit. The early stagnancy was small persimmon-shaped, and the latter fruit was strawberry-shaped, with a diameter of 2cm and a length of about 1.5cm. The skin was thick and hard, bright and shiny, and the shank was long. The interior had no seeds or seeds, no pungent taste, and the fruit did not inflate. After the environment is suitable, the fruit is not developed. Second, the cause of the formation of stalemate is mainly flower bud differentiation period, that is, about 35 days after sowing, the plant affected by drought, disease, temperature (13 °C below and 35 °C above), the pistil due to imbalance in nutrient supply and the formation of short stigma flower, pollen Can not normally grow and disseminate, pistil can not be normal pollination and fertilization, that is, the production of unisexual fruit, the fruit lack of growth stimulating hormone, affecting the absorption of zinc, boron, potassium and other fruit expansion elements, so the fruit does not inflate, long-term become a rigid fruit . Third, the law of winter peppers over the cold season, from December to next April, the greenhouse temperature during the day as high as 35 ~ 40 °C, only 6 ~ 8 °C in the middle of the night, so prone to stalemate. In the same greenhouse, the peppers are deeply planted, have long main roots, strong absorption, close to the gables, and are lightly frosted at night; the water is nutritious, the pistil forms long stigma flowers, and fertilization is complete, producing long-horned peppers. Otherwise, the entire plant, pruning, or some fruits will be deformed due to incomplete fertilization, and those who are not fertilized will become incomplete. The main external factors affecting pollination and fertilization are temperature, followed by light, humidity, disease, injury, and moisture; physiological factors are nutritional disorders. Low temperature is the most important factor affecting fertilization and should ensure that the night temperature is above 15°C. However, even in the cold winter, there will be transient daytime high temperatures in the greenhouse, night low temperature, due to narrow temperature range of pepper pollination and fertilization, if not timely regulation, it will be poor fertilization, resulting in deformed fruit or stale fruit. In addition, the plants will suffer dwarfing due to fertilizer damage, which will result in ossification due to phytotoxicity, long-term growth due to high temperature and humidity, and poor ventilation. This can result in serious flowering and fruit drop, more fruit failure, and long duration. Generally the damage is sustained for 1 time. About three days of stalemate. Above pH 8 in the soil, plant viruses interfere with the intrinsic substances (nutritional hormones, etc.) in the plant body, and they will also suffer from unnatural consequences. Fourth, preventive measures 1. When the peppers are planted in winter, the nutrient soil should be placed on the ground level below the ground level, and then cover the soil 3 ~ 5cm high. In the flower bud differentiation period to prevent drought. At other times, the water is used to promote rooting to prevent the formation of abnormal flowers. 2. The seedlings must be seeded in 2 to 4 true leaves to prevent the sub-seedlings from damaging the roots too late and affect the nutrient supply during flower bud differentiation, resulting in thin floret and incomplete flowers. 3. When using separate seedlings, use 700 to 1000 times zinc sulfate to root, in order to increase the length and growth rate of the roots, and improve the absorption and resistance to stress. 4. Flower bud differentiation period and pollination and fertilization period strictly controlled at room temperature during the day at 23 ~ 30 °C, night 18 ~ 15 °C, ground temperature 17 ~ 26 °C, soil moisture equivalent to 55% of water holding capacity, light 1.5 ~ 30,000 Lx, pH Values ​​5.6 to 6.8. 5. Use winter strong varieties, such as Yangjiaowang, Taiyuan 22, Xiangyan No. 15, etc. Before sowing, seeds should be soaked with potassium permanganate 1000 times to eliminate pathogens. 6. The cultivation greenhouse pepper span should be controlled within 7m, height within 2.8m, length 40m in order to regulate the temperature and humidity of the greenhouse. Poultry Antibody,Antibody For Poultry,Duck Tongue Disease Antibody,Plague Viral Yolk Antibody Shangqiu Meilan Biological Engineering Co.,Ltd , https://www.melanvaccine.com