The three insects that harm the beans are: leaf miner, red spider bean pod, and now the sun is hot, how can the bean horn prevent the "three insect damage" under high temperature? Bean pods: Between 6 and 10 months of each year, the larvae are harmful, the adults have phototaxis, and the eggs are scattered on the tender horns, flowers and petioles. The newly hatched larvae enter the tender horns or feed, causing the flowers and horns to fall off, and the older larvae licking. Feeding into the beans, the damaged beans often rot after the rain. The larvae have the habit of crouching and backlighting. 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 crawling from the wormholes in the evening. Come out to the event and stop going out in the early morning of the next day. Control measures: remove the fallen leaves in the field, and remove the damaged leaf and beans to reduce the source of insects. Set up black light, use the adult light tending habits to engage in trapping. The agent is selected from 5% Regent 2000 times solution, 40% fenvalerate 6000 times solution, 2.5% deltamethrin 3000 times solution, etc., and is sprayed once every 10 days. Leaf miner: The larvae sneak into the leaves, and the mesophyll only leave the epidermis, forming a tortuous tunnel, affecting plant growth. The leaf miner is mainly pea, bean, cowpea, cabbage, broccoli, cabbage, rape, radish, lettuce, tomato, eggplant and potato. Control measures: using the wormworm board to trap adult worms, adults mainly lay eggs on the back of the leaves, spraying the liquid to focus on the back of the leaves. When the larvae start, select an insecticide that has both systemic and contact killing effects, such as 48% lesbian oil 800-1000 times liquid, and spray it continuously for 2 to 3 times. Red spider: The red spider on the bean is also called the bean leafhopper. From August to September, it is a prosperous period. The leafhopper sucks on the young leaves, and the leaves are damaged and easy to fall. At the beginning of the occurrence, the leaf surface becomes red after turning green and white, and the fine mesh of the leaf back can directly see the extent and area of ​​occurrence. Immediately after the occurrence, spray a pesticide enveloping ring with a sprayer, the range of which is slightly larger than the range of occurrence, and then completely spray the plants in the encircling ring to prevent the red spider from spreading. Control measures: 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 2000å€æ¶², etc. Pay attention to the rotation of drugs, and promote the use of high-efficiency, low-toxic biological pesticides. The above is how the beans can prevent the "three insects" harm, for your reference, and hope to help you. Huinong School has more relevant agricultural technology knowledge. Continue to pay attention to Huinong School to answer questions during planting or breeding. Copyright Tip: Hui Nongwang platform respects and protects intellectual property rights. If you find copyright problems in the platform articles, please contact us and handle them in time. Disclaimer: Some of the content is reproduced from other media. The purpose of the reprint is to convey more information. It does not mean that the Hui Nongwang platform agrees with its views and is responsible for its authenticity.
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How to prevent "three insects" harm