The greenhouse whitefly, also known as the greenhouse mealworm, is not only harmful to the vegetables in greenhouses and greenhouses, but also seriously damages the exposed vegetables and becomes one of the main pests of vegetables. The host of this pest is widespread, mainly causing damage to cucumbers, eggplants, tomatoes, green peppers, and beans, as well as flowers, fruit trees, and Chinese herbal medicines. It is based on adult and nymphs clustering on the back of the host to suck juice, and the victim leaves fade, yellow, and even die. At the same time, the honeydew excreted by adults contaminated the leaves and fruits, and caused parasites of coal pollution, reducing the commodity value of the product. In addition, it can also spread the virus and seriously affect production. The insects are yellowish-white, covered with white wax powder, and adults fly poorly and have a high degree of clustering. Many spots in the field occur, then gradually spread and spread, hi live on the back of young leaves on the upper part of the plant. Prevention and control technology: 1. Remove weeds and leaves in time to eliminate insects. 2, drug control: (1) winter control: using dichlorvos fumigation agent to kill adult, you can also use high concentrations of dichlorvos mounted in the bottle upside down, slowly drip solution, with the help of indoor heat and volatile, but also has good results. (2) Prevention during the occurrence period: The application of pesticides is controlled at the initial stage. With 20% of chrysanthemum 2000-3000 times solution to adult, nymph, cockroach, egg control effect reached more than 90%. 40% omethoate had good control effect on adults and nymphs and had poor effects on eggs and cockroaches. In addition, it can also be used to control pupae and imidacloprid.