The yellow song is a kind of cockpit insect, Coleoptera pests, commonly known as locusts, fleas, the owner's surname is usually called "the mantle." Adults bite on the leaves, which are densely packed holes. The seedlings suffer the most. The larvae only harm the roots of the vegetables, eat the root bark, and bite off the fibrous roots, causing the leaves to wilt and die. The radish was tainted with many dark spots, and finally it turned black and rotted; cabbage leaves became black and died, and spread soft rot. According to a recent survey, radish and cabbage are in the seedling stage, and the worms are widespread. The insect field rate is 100%, and the insect strain rate is more than 65%. The highest single plant has 4 insects. The pests have a strong ability to transfer damage, and prevention and treatment should adhere to unified prevention and control of regional vegetable fields, and priority should be given to green prevention and control measures based on physical control. Physical control: In combination with other pests, black light or frequency-vibration insecticidal lamp is used to trap and kill adult insects; placing yellow or white armyworm board at 25 cm from the ground, 30-40 pieces per mu, can also reduce adult size Quantity. Chemical control: Soil treatment kills the larvae and ticks of the yellow-bellied trichopons in the soil and can be used to irrigate the roots with 300 g/l Chloasmide Thiamethoxam Suspension; leaf spray to kill the adult, optionally 25% thiamethoxam water Disperse granules 3000 times, or 3% pyrethroid EC 800 times, or 17 grams of 5 rattan essential oil EC, watering 40-50 kg evenly spray. Precautions: Spray before 9am or after 6pm in the summer. The spray should be sprayed through the blades to wet the soil. If the field is wider, the insect should be surrounded by spraying it first and then spraying it around the center. If the field is long and narrow, it can be sprayed at one end and then sprayed from the other end to prevent the adult from fleeing. Application should strictly follow the safety interval.
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