First, temperature control. Kidney beans do not like high temperatures, and higher temperatures often cause legumes to grow and fall. The temperature in the spring shed is relatively high. If we do not pay attention to strengthening the ventilation, the flowering fruit set rate of cowpea will not be very high. Even if we sit down, it will fall out of flower and fall down. Therefore, if you want to get high yields of cowpea, it is very important to regulate the temperature of the flowering period. Under normal circumstances, the most suitable temperature for flowering cowpea is 20-24°C. If the temperature is higher than 24°C, the fruit setting rate will fall. If the temperature is higher than 28°C, serious flowering and falling will occur.

Second, control the water. Watering flowers during flowering will cause the beans to fall and fall. Therefore, watering must be prohibited during flowering. In order to prevent the soil of the shed during the flowering period of the cowpea from being too dry, the small water can be slipped in the planting ditch before flowering to ensure that the soil in the cowpea flowering period is not too dry.

Third, make up boron. The lack of boron fertilizer is also one of the important reasons causing the falling of the beans. Therefore, the boiled bean must be supplemented with boron fertilizer before flowering. It can spray 600 times borax or 1200-1500 times the speed of Boron, which can significantly increase the rate of flowering and fruit setting, and avoid flowering and falling down. It needs to be emphasized that the deficiency of boron in some vegetable fields is mostly caused by the impossibility of obstructing the ability of the roots to absorb the fertilizer due to the excessive drought in the soil. Therefore, the cowpea must pay attention to keeping the soil dry and wet.

Fourth, drug control. Kidney beans should be banned with chemicals containing pyrimethanil, mancozeb, anthraquinone, and anthrax. The copper preparations should also be halved. During the flowering period of cowpea, it is more sensitive to pesticides and is often susceptible to phytotoxicity, especially to pyrimethanil. Therefore, when cowpeas are used in medicine, they must not choose medicaments containing the above-mentioned ingredients. Spraying such medicaments will not only cause yellow leaves, but also cause serious fall and fall. In addition, in the use of drugs, it should also pay attention to the chemical concentration of the liquid to be scientific and reasonable, the general flowering should stop spraying, so as to avoid the occurrence of phytotoxicity, resulting in the occurrence of cowpea flower falling down.

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