Recently, the Changping District Plant Protection and Quarantine Station carried out a general survey of the occurrence of pests and diseases in vegetable fields in the region. It was found that the green onions, thrips, and horses were common, and individual plots had up to 100 heads per plant, reminding onion growers to beware of onion thrips. Timely prevention and control will minimize production losses. Damage characteristics Onion thrips mainly injure garlic, solanaceous, melons, kidney beans, legumes, leeks and other crops in Beijing. Adults and nymphs take heart-feeding leaves and shoots with sucking mouthparts to form fine, long, gray-white necrotic spots. Occurrence of chlorosis of onion leaves at the beginning of the season occurs when the leaves are contaminated and the leaves twist and die. At the same time the onion thrips can also spread a variety of viruses. Control methods Clean the garden and reduce the source of insects. Timely removal of weeds in the field, old branches and leaves, deep soil, in order to reduce wintering sites and reduce the source of insects. Scientific management, reasonable water and fertilizer. Strengthen field water and fertilizer management, increase phosphorus and potassium fertilizers, cultivate robust plants, and increase plant resistance. Diligent watering, cultivating and weeding, inhibiting the reproduction of pests. Rotate with different crops to cultivate an environment that is not conducive to the development of thrips. Plastic film blocking, blue plate trapping. Can be used to cover the cultivation of plastic film to prevent pests from entering the earth; at the same time hanging blue plate trapping. Note that the swatches are level with the green onions. Beware of Hummer, timely prevention and treatment. The pesticide was applied immediately when 100 insects in the field reached 50-100 heads. The agent can be selected from 10% imidacloprid wettable powder 2500 times, or 2.5% vegetable suspension 1000-1500 times, or 25% akhtek water dispersant 3000-4000 times, or 1.8% chlorfen 2500- 3000 times, or 2.5% Uranus EC 2000-2500 times. Spray 2-3 times, once every 7-10 days. As there are waxy layers on the surface of green onion leaves, the adhesion of the liquid is poor. Therefore, it is necessary to add a synergistic spreading agent or a neutral washing powder in order to enhance the control effect. Pay attention to the rotation and use of drugs and safety intervals.