The flowering and fruit dropping of green pepper affect the yield. What should I do?

Laohu, a greenhouse grower in guandu town, zhongmou county, Henan Province, reported that the two acres of greenhouse peppers he planted this year are growing well and have now entered the full flowering period. Pepper has never borne fruit, and the flowers and fruits are still quite serious. In fact, this situation is very easy to appear in this greenhouse pepper period. Pepper planting is malnourished. Due to improper seedling raising, pepper grows too fast, and the nutritional growth and reproductive growth are unbalanced, resulting in insufficient nutrition of pepper flowers and fruits. In greenhouse cultivation, pepper is easy to grow excessively and fall into flowers and fruits.

In winter and spring, the climatic conditions in greenhouses are unfavorable, and there are often insufficient light, high and low temperature, poor ventilation and high humidity. These unfavorable conditions lead to the failure of normal pollination of pepper, which is easy to lead to falling flowers and fruits. Pepper diseases and insect pests can also cause falling flowers and fruits. For example, after pepper is infected with virus, it often appears dead top, which leads to falling flowers and fruits, and tobacco budworm easily leads to fruit loss. At night, the temperature is higher than 18 degrees, and a large number of nutrients provide me with nutrition and growth, which leads to excessive growth and is easy to drop flowers and fruits. If too much nitrogen fertilizer is used in the early stage, too much water and too many times, it will also cause flowers and fruits to fall. Because pepper root system is too shallow, it is not suitable for watering. Excessive application of nitrogen fertilizer in the early stage will lead to excessive plant growth and easy to lead to no fruit. The most correct watering management of pepper flowering period is: watering according to the soil moisture period of pepper, keeping the soil dry and wet, and avoiding too many watering times and watering too much.

The temperature in the greenhouse shall not be lower than 15 degrees at night and not more than 35 degrees during the day. Pay attention to ventilation. The planting density should be reasonable, which should be conducive to the ventilation and pollination of flowers. If the flourishing growth is not particularly serious, it is suggested to add 100g potassium dihydrogen phosphate in a bucket of water to increase the dry matter of pepper and control the flourishing growth. 50- 100 mg/L plant regulator and methylphenidate solution can be sprayed. Pay attention to spraying evenly when using, and don't spray again. Farmers can dilute the solution 500 times with 0. 1% naphthylacetic acid, and then spray it with a small sprayer. When spraying, it must be sprayed on the pepper flowers. Adding some zinc fertilizer or boron fertilizer in the process of spreading is beneficial to improve the fruit setting rate of pepper and prevent the occurrence of flower and fruit falling. First of all, the spraying time should be before 10 in the morning and after 4 pm.