What to Do About Flower and Pod Drop in Yardlong Beans? A Detailed Guide to the Latest Control Methods

Yardlong beans are relatively difficult to manage during planting and production, and are highly prone to excessive vegetative growth that makes pod setting difficult, and may also show flower and pod drop, which affects the yield of yardlong beans and directly affects the income of farmers. So what should be done about flower and pod drop in yardlong beans? Let us learn about the detailed content together.

1. Causes

① Temperature too low or too high. During the flowering period, if the temperature is higher than 35 degrees or lower than 15 degrees, it will affect the flower bud differentiation of the plant, causing poor development of the floral organs and the formation of infertile flowers, thus leading to flower and pod drop.

② Insufficient nutrition. During the flowering and podding period, the flowers and pods need sufficient nutrients to grow, and if the plant has insufficient nutrition, the flowers and pods compete with each other for nutrients, and because of uneven nutrient distribution, flower and pod drop occurs.

③ Zinc deficiency. Due to zinc deficiency in yardlong bean plants, the amount of gibberellin synthesized decreases, and because the petioles and fruit stalks lack auxin, abscission occurs.

④ Humidity too high or too low. Humidity also affects pollen, especially in a high-temperature and high-humidity environment, where the effect on it is greater, causing the mucus on the style to lose its role in inducing pollen germination.

⑤ Insufficient light and poor ventilation. Yardlong beans are relatively sensitive to light intensity during growth, especially after flower bud differentiation; when light is weak, the number of dropped flowers and pods increases, and poor ventilation can also cause flower and pod drop.

2. Preventive Measures

① Choose good seeds and sow at the right time. Before planting, choose excellent varieties with wide adaptability, strong stress resistance, and a high pod-setting rate; in addition, according to local climatic conditions, choose a sowing time at which the full flowering period of yardlong beans can avoid the high-temperature season.

② Reasonable close planting. When planting, intercropping or trellising can be used to create an environment with good ventilation and light transmission, which can improve light and ventilation and reduce air humidity.

③ Strengthen fertilizer and water management. Reasonably apply nitrogen, phosphorus, and potassium fertilizers as well as other trace elements; when fertilizing, follow the principle of light application before flowering, more application after flowering, and heavy application during the peak podding period.

④ Spray foliar fertilizer. During the flowering and podding period, the plant will produce a large number of old leaves; at this time, promptly spray zinc-containing foliar fertilizer, which can accelerate the synthesis of gibberellin and prevent premature aging of the plant.

The above is an introduction to what to do about flower and pod drop in yardlong beans. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.