What about kidney beans falling flowers and pods?

Kidney beans drop flowers, pods there are the following reasons and solutions for farmers' reference. First, varieties: individual varieties cultivated in early spring, cold resistance, stress resistance is poor. Second, the influence of climate: the weather is cloudy and cold after the Spring Festival. Third, cultivation misunderstandings: (1) insufficient supply of fertilizer and water or excessive watering at early flowering stage. (2) the temperature difference between day and night in the shed is too large. Many farmers use "pull early and cover late" in the use of cold curtains, so that the night temperature in the shed is reduced to about 10 ℃, or even lower. And the temperature is too high during the day. In the management of the vent, it is often pulled enough or covered strictly at one time, resulting in a sharp rise or drop in the temperature in the shed, resulting in a "cold" of the plant. The method of "pulling the cover early and closing the tuyere step by step" should be adopted to keep the temperature in the shed at 18 ℃ ~ 28 ℃, not less than 13 ℃ and no more than 32 ℃. (3) pay no attention to root cultivation and rooting, but only pay attention to pod formation. As the saying goes, "the root system is the stomach of the plant". In the process of kidney bean cultivation, we should not only prevent the soil from being too acidic, but also prevent the soil from being alkaline, but also pay attention to the rational use of chemical fertilizer. According to relevant data, carbohydrates account for about 96% of all green plants, while nitrogen, phosphorus and potassium account for about 4%, of which potassium is about 2.2%, nitrogen is about 1.4%, and phosphorus is about 0.4%. Therefore, kidney beans in the cultivation process, emphasis on the use of chemical fertilizer is one of the important reasons for falling flowers and pods. (4) Nutrition regulation is not timely, and many farmers have a mentality of "promoting seedlings in the early stage, sad flowers in the middle stage, and fear of falling pods in the later stage". In fact, in the process of promoting seedlings in the early stage, a weak situation of "thin seedlings, long seedlings and thin leaves" has been formed. Therefore, in the process of management, we should pay attention to: give priority to nutrition regulation, spray a certain multiple of humic acid (such as Gao Meishi, Huimanfeng, Poole, peasant, etc.) foliar fertilizer or amino acid foliar fertilizer (such as Wanwushun, Agricultural Science Star, etc.). And combined with small water irrigation biological organic humic acid flushing fertilizer (such as Yangzhuang Chong application ointment) 1215kg per mu. (5) pay attention to the prevention and control of diseases and insect pests: anthracnose, leaf spot, gray mold, stem rot (or sclerotinia disease) often occur in kidney bean in early spring. Insect pests include whitefly and aphids, which can be controlled by nutritional regulation.