The growth period of the beans is high when the temperature is high and the rain is heavy. The pests are severely attacked. If the problem cannot be kept up, the quality will be reduced and the output value will be reduced. In the prevention and control measures, agricultural control should be the mainstay, and physical and chemical control should be heavily biased. Below, the Century Pesticide Network Xiaobian has compiled three kinds of pest control methods for the beans. I hope to help everyone.
First, the bean pod
Bean pods are larvae from June to October every year. Adults have phototaxis, and eggs are scattered on tender horns, flowers and petioles. The newly hatched larvae enter the tender horns or flowers to feed, forming flowers and horns. The older larvae feed into the beans and feed the beans. To decay. The larvae have the habit of nocturnal nights and backlights. They hide in the flowers, beans or curls in the daytime, and discharge the worms to block the pupils. In addition to the rainy days and white days, there are sporadic activities, usually starting from the insects in the evening. The hole climbed out of the activity and stopped going out in the early morning.
Prevention and treatment methods:
1. Remove the fallen leaves in the field and remove the damaged leaf and beans to reduce the source of the insects.
2. Set up a black light, use the adult light habits, and let the trap.
3. The agent is selected from 5% Regent 2000 times solution, 40% fenvalerate 6000 times solution, 2.5% deltamethrin 3000 times solution, etc., and sprayed once every 10 days.
Second, the leaf miner
The larvae sneak into the leaves, and the mesophyll only leave the epidermis, forming a curved tunnel that affects plant growth. The leaf miner is mainly pea, bean, cowpea, cabbage, broccoli, cabbage, rape, radish, lettuce, tomato, eggplant, potato, etc.
Prevention and treatment methods:
1. Use the armyworm board to trap adult insects.
2. Adults should first lay eggs on the opposite side of the leaves, and spray the liquid to focus on the opposite side of the spray. When the larvae start to damage, select insecticides that have both systemic and contact-killing effects, such as 48% lesbian oil 800-1000 times liquid, etc., and spray them 2 to 3 times in succession.
Third, red spider
The red spider on the bean is also called the bean leafhopper. From August to September, it is a prosperous period. If the leaves are bitten, the leaves will be easy to fall after being killed. At the beginning of the attack, the leaf surface becomes green after turning green, and the fine mesh of the leaf back can directly see the scale and area of ​​the attack. Immediately after the attack, spray a pesticide enveloping circle with a sprayer, the scale of which is slightly larger than the scale of the episode, and then completely spray the plants in the encircling circle to prevent the red spider from dispersing.
Prevention and treatment methods:
1. Pay attention to the monitoring of insects and find that there is a small amount of damage. The insects should be removed in time. In case of climate drought, pay attention to timely irrigation and fertilizer, promote plant growth, and proliferate according to the leafhopper.
2. Use the selective acaricide for general treatment, before the pod-forming period and after the pod harvest, focusing on the even spray on the opposite side of the leaf. It can spray 20% compound Liuyangmycin EC 1000 times solution, 1.8% avermectin EC 1500～2000 times solution, 15% 哒螨çµä¹³æ²¹ 3000 times solution, 20% 螨克乳油 2000 times solution, etc., pay attention to rotation medicine , initiated the use of high-efficiency, low-toxic biological pesticides.
More pesticide knowledge , please pay attention to China Pesticide Network
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