Detailed Explanation of the Key Control Techniques for Bean Pod Borer

In bean production, the most important pest is the bean pod borer. Its adults are dispersed and well hidden, lay eggs over a wide area and in large numbers, and are relatively difficult to control, making it one of the main reasons affecting bean quality. So how should the bean pod borer be controlled? Let's take a look.

1. Agricultural control

Before planting, the soil should be deeply plowed and treated for pest elimination to destroy the overwintering pest sources in the soil. When the pest occurs, fallen flowers and fruits in the field should be removed promptly, and damaged leaves and pods should also be picked off promptly and buried deep to destroy the eggs and reduce the pest sources. In winter and spring, water more often to increase soil moisture, which can cause the larvae overwintering in the soil to die. Improving a series of agricultural control measures can greatly reduce the degree of damage by the bean pod borer and has a certain effect on increasing yield.

2. Strengthen fertilizer and water management

In cultivation management, emergence should be uniform and neat, so that the bean pod borers can be eliminated in a concentrated way during flowering and podding. Therefore, fertilizer and water management for beans should be strengthened. During the flowering and podding stage, sufficient fertilizer should be applied, and some flower buds that appear early or late should be appropriately removed. This can improve the plant's resistance to pests and diseases and reduce the damage caused by the bean pod borer.

3. Biological control

Bacillus thuringiensis or Bacillus prodigiosus can be sprayed at a 500-fold dilution, and Beauveria bassiana can also be sprayed at a 300-fold dilution for control. The bacterial solution is best prepared and used immediately to avoid death of the live spores in the solution, which would weaken the efficacy, and Beauveria bassiana must be sprayed within two hours after the solution is prepared. The best control period is spraying on 2nd-instar larvae, once every week, for several consecutive times, for a better effect.

4. Chemical control

Chemical pesticide control is a commonly used control technique. Generally, before flowering, the larvae inside the flower buds are sprayed. The spraying time is usually chosen on a sunny morning, when the flower buds are opening, so that the pesticide solution can enter the buds and poison the larvae, giving a good effect. After the flowers fade, when the pods grow to about 10 cm, spray the pesticide 1-2 times, which can kill newly hatched larvae or young larvae boring inside the young pods.

The above is an introduction to the control techniques for the bean pod borer. I hope it can help you. If you want to learn more related knowledge, please stay tuned to us.