Due to the short growing period of cowpeas, there is a slight carelessness in management, which makes it easy to drop flowers and cause losses. From four aspects, the reasons for the fall and fall of pod beans are analyzed and used for reference by farmers and farmers in production. Unsuitable temperature caused by falling flowers. Cowpea is a thermophilic and heat-resistant crop, especially sensitive to low temperatures. Below 10°C, growth is hindered and below 5°C. The optimum temperature for plant growth is between 20°C and 28°C. It can also be adapted to the high temperature of 30°C to 40°C in the short term. The optimal temperature for flowering and scabbing is 25°C-28°C, and the ability of scabs to rise above 35°C is reduced, and it is easy to cause falling flowers in the environment of continuous high temperature. Uneven drought and flood caused by falling. Kidney beans are particularly sensitive to moisture during the early flowering period. Excessive water content can easily cause leggy and cause flowers to fall. A large amount of water is required during the pod-logging period. If it is hot and drought at this time, it will easily result in falling flowers. The water in the field, the soil moisture is too large, is not conducive to the growth of roots and root nodules, resulting in roots, rot, causing the leaves yellow off, leading to falling out of flower. In general, the air humidity needed during the growth of cowpea is between 55% and 60%. The plants are caused by falling flowers. Cowpea is affected by indoor high temperature in the early stage of growth, and it is easy to cause plants to grow. If it is not controlled in advance, the plant grows quickly, which can easily lead to the imbalance of carbon and nitrogen ratio of the plants. The nutrients can not be supplied in a balanced manner, so that between the leaves and flowers, flowers and flowers Between the fruit and the fruit, there was a fight for nutrients, which led to the fall of flowers. In terms of management, the water and fertilizer control should be appropriately controlled in the early stage, and the management mode of “pre-control and promotion†should be adopted. After the plants are flowered and scabbed, fertilizer and water should be increased to promote growth, more flowering, and more pods, if the plant growth at this time. Poor, malnutrition, can not meet the needs of stems and leaves for nutrients, but also prone to falling. Diseases and insect pests caused by falling flowers. During the whole growth period, cowpea has a high percentage of inflorescences and buds, although the rate of pod formation is not high, and the most vulnerable pest during the flowering period is pod bean pods. Cardamom pods mainly harm flowers and pods. Once they are harmed, they cause a large number of falling flowers. In addition, bean rust, damage to the leaves, if not timely treatment, it is easy to cause falling flowers. Prevention and control measures: Through the above analysis, there are many causes of falling beans and falling out of cowpeas, and they should be treated differently. Symptomatic treatment can achieve ideal control effects. Jiangsu Tiera Biotechnology Co., Ltd , https://www.tierabio.com