Latest Control Measures for Bean Shoot Borer in Common Beans
The common bean shoot borer, also called the cowpea pod borer, is one of the most common pests during the growth of common beans. Because it reproduces quickly and covers a wide area, it is very difficult to kill completely. To help everyone better control this pest, below we bring you the control measures for the common bean shoot borer. Let's take a look.
1. Focus on agricultural control
Promptly remove fallen flowers and pods in the field, and pick off damaged curled leaves and pods, then bury them deeply or burn them, promptly destroy the larvae in the flower buds, so as to reduce the pest source and prevent the pest from spreading further. In winter and spring, water more to increase soil moisture, so that the larvae that have entered the soil to cocoon will die. In winter, plow the soil deeply so that the overwintering larvae in the soil are exposed and either freeze to death or are pecked by birds, thereby reducing the overwintering pest source.
2. Strengthen fertilizer and water management
In planting management, seedlings are required to emerge uniformly, grow neatly, and have a relatively concentrated flowering and podding period, so as to avoid concentrating the elimination of the shoot borer in this period. Therefore, fertilizer and water management should be strengthened, flower and pod fertilizer should be applied sufficiently in one go, and flower buds that open early or late should be appropriately removed so that the maturity period is consistent, which is helpful for pest control.
3. Biological control
During the peak period of shoot borer larvae, biological control methods can be used. You can spray with 500 times dilution of Qingchongjun, Shamianjun, or BT emulsion each containing 10 billion viable spores per gram, or spray with 300 times dilution of Beauveria bassiana each containing 10 billion viable spores per gram. Note that the bacterial solution should be used immediately after mixing, and after mixing Beauveria bassiana it should be sprayed within 2 hours, once every week, for several consecutive sprays.
4. Chemical control
Chemical control adheres to the principle of “focusing on the buds”. Spray pesticide during the flowering period to kill the larvae in the flower buds. The best spraying time is 8-10 a.m. on a sunny day, when the buds are opening, which helps the solution enter the flower buds and kill the larvae promptly. In addition, after the flowers fade and the pods grow to more than 10 cm, spray 1-2 times, which can kill newly hatched larvae and young larvae that have bored into young pods. The chemical agent chosen should cause no pesticide damage to common bean flowers and young pods and have good permeability. You can choose fenvalerate, Susha Mie, synergistic fenvalerate-malathion emulsifiable concentrate, Kung Fu, and other agents. Note to alternate the agents to avoid resistance. Spray once every 7 days, for 2-3 consecutive sprays. You can also, during the peak period of adults, mix dichlorvos with soil to make poisonous soil and evenly scatter it on the ground to kill them.
The above is an introduction to the control measures for the common bean shoot borer. We hope it can help you. If you want to learn more related knowledge, please follow us.