Four taboos in common bean flowering period management, growers should pay attention

1. Avoid high temperatures. Common beans do not like high temperatures; higher temperatures often cause the vines of common beans to grow excessively and lead to flower and pod drop. In spring, the temperature inside the greenhouse is relatively high, and if ventilation is not strengthened, the flowering and fruit-setting rate of common beans will certainly not be very high, and even after fruit set, flower and pod drop will still occur. Therefore, if you want to achieve high yields of common beans, regulating the temperature during the flowering period is very critical. Under normal circumstances, the most suitable temperature for the common bean flowering period is 20-24°C; when it is higher than 24°C, the fruit-setting rate decreases, and when it is higher than 28°C, serious flower and pod drop occurs.

2. Avoid watering. Watering during the flowering period will cause flower and pod drop in common beans, so watering must be prohibited during the flowering period. To prevent the soil in the greenhouse from being too dry during the common bean flowering period, a small amount of water can be run through the planting furrow before flowering to ensure that the soil is not overly dry during the common bean flowering period.

3. Avoid boron deficiency. Boron fertilizer deficiency is also one of the important causes of flower and pod drop in common beans, so boron fertilizer must be sufficiently supplemented before the common bean flowering period. Spraying 600-fold borax solution or 1200-1500-fold Sulubo solution can significantly increase the flowering and fruit-setting rate and avoid flower and pod drop. It should be emphasized that boron deficiency in some vegetable plots is mostly caused by soil that is too dry, which obstructs the root system's ability to absorb fertilizer; therefore, during the common bean flowering period, attention should also be paid to keeping the soil from being too dry or too wet.

4. Avoid using pesticides indiscriminately. Common beans should avoid pesticides containing pyrimethanil, mancozeb, anthracnose fumei, or diethofencarb components, and copper preparations should also be used at half the rate. Common beans are relatively sensitive to pesticides during the flowering period and are often prone to pesticide damage, especially from pyrimethanil. Therefore, when using pesticides on common beans at ordinary times, pesticides containing the above components must not be selected; spraying such pesticides will not only cause yellowing of leaves, but in severe cases will also cause flower and pod drop. In addition, when using pesticides, attention should also be paid to ensuring that the pesticide solution concentration ratio is scientific and reasonable; generally, spraying should be stopped during the flowering period to avoid pesticide damage and prevent a major outbreak of flower and pod drop in common beans.