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In the early autumn, the pests are serious. If the management can't keep up, it will easily lead to lower quality and lower yield. In the prevention and control measures, agricultural prevention and control should be the mainstay, and physical and chemical control should be equally important.
pod borer
From June to October every year, the larvae of the pea pods are harmful. Adults have phototaxis, and eggs are scattered on tender horns, flowers and petioles. The newly hatched larvae plunged into tender horns or flowers to feed, causing flowers and horns to fall off. Older larvae plunged into the beans to feed, and were often rotted after being attacked by beans. . The larvae of the pea pods have the habit of nocturnal nights and backlights. They hide in the flowers, beans or curls during the day, and discharge the worms to block the pupils. In addition to the rainy days and sporadic activities during the day, they usually start from the wormholes in the evening. Climb out of the activity and stop going out in the early morning.
Control measures: First, remove the fallen leaves in the field, and remove the damaged leaf and beans to reduce the source of insects. Second, set up black light, use the adult light tending habits, and let the trap. Third, 40% fenvalerate 6000 times solution, 2.5% deltamethrin 3000 times solution and the like are sprayed once every 10 days.
Leaf miner
The larvae of the leaf miner sneak into the leaves and eat the mesophyll. Only the epidermis are left behind to form a tortuous tunnel, which affects the growth of the plants. The leaf miner is mainly harmful to peas, kidney beans, cowpeas, etc. It is also harmful to cabbage, broccoli, cabbage, rape, radish, lettuce, tomato, eggplant, potato and other vegetables.
Control measures: First, the use of sticky board to trap adults. Second, adults mainly lay eggs on the back of the leaves. When spraying the liquid, focus on the back of the leaves. Third, when the larvae start, select an insecticide that has both systemic and contact killing effects, such as 48% chlorpyrifos 800-1000 times liquid, and spray 2-3 times continuously.
Red Spider
The red spider on the bean is also called the bean leafhopper. It is the period from August to September. The adult and the nymphs suck on the young leaves, and the leaves are shrunk and fall off after being killed. At the beginning of the red spider attack, the leaf surface becomes red after turning green and white, and the range and area of ​​the occurrence can be directly seen from the fine mesh of the leaf back. Immediately after the discovery of the red spider, a sprayer sprayed a pesticide enveloping circle, the range of which was slightly larger than the range of occurrence, and then completely sprayed the plants in the encircling circle to prevent the spread of the red spider.
Control measures: First, when a small amount of damage is found, the insect leaves are removed and burned in time. The weather is dry and attention should be paid to timely irrigation and fertilization to promote plant growth and inhibit leaf aphid proliferation. Second, the use of selective acaricides for general treatment, before the pod-forming period and after the pods are harvested, focuses on even spray on the back of the leaves. It can spray 1.8% avermectin EC 1500-2000 times liquid or 15% 哒螨 乳 emulsified milk 3000 times liquid, 20% 螨 乳 EC 2000 times liquid, etc., pay attention to the rotation of drugs, advocate the use of high-efficiency, low-toxic biological pesticides.
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