1.实行非喜食寄主蔬菜轮作，避免适生寄主瓜类、豆类、茄果类蔬菜混栽套种

1. Carry out non-favorite host vegetable rotation, and avoid mixed planting of suitable host melons, beans and nightshade vegetables. After harvesting, weeds and plant debris should be thoroughly cleaned, properly treated or fermented at high temperature to reduce the source of insects. <br>2. Cultivate pest-free seedlings and separate seedling production from greenhouse production. Before breeding and transplanting, the residual insect mouths are thoroughly smoked, and the air outlets are isolated with insect nets to control the source of foreign insects. <br>3. Use yellow boards to hang or kill yellow pots. In the early stage of whiteflies, put the yellow board on the plastic film and coat it with motor oil or sticky shellac, hang it in the shed to trap and kill the adults, and change the plastic film and sticky shellac regularly. You can also use yellow pots to hold fresh water, put a certain amount of washing powder in it, and support it in the field, the height is slightly lower than the growth point of the plant, to lure adults. Pay attention to regularly remove floating adults and change water. <br>4. Biological control. When the whitefly adults in the protected area are below 50 heads per 100 plants, 300-500 heads of the black pupae "Aphididae" are released. They are released once every 10 days, and the bees are released 3-4 times in succession. The parasitic rate can reach more than 75%. During the period of bee release, it is possible to apply 1000% solution of 25% manganese manganese wettable powder to control the adults, nymphs and eggs of whitefly, without affecting the growth and reproduction of the small bee aphid. <br>5. Medicament prevention. Due to the overlapping generations of whiteflies, various insect forms exist at the same time, and there is currently no agent that kills all insect forms simultaneously. The control of a kind of medicament needs to be continued several times, and according to the vertical distribution of each insect state, the corresponding insect state should be focused on to ensure the control effect. Optional 25% chlorpyrifos wettable powder 1000-1500 times liquid, or 2.5% Uranus emulsifiable concentrate 2000-3000 times liquid, 20% Kangfuduo concentrated solvent 2000-3000 times liquid, 25% Aktai water dispersible granule 3000 ～ 5000 times liquid. 5% Nongmente EC 1000 ～ 2000 times liquid, 25% Youjiaan wettable powder 800 ～ 1000 times liquid, 10% cypermethrin EC 2500 ～ 3000 times liquid, 3% Mobilan EC 1000 ～ 2000 times liquid. 40.7% Le Siben emulsifiable concentrate 800 ~ 1000 times liquid spray. When the pest is serious, you can use 2.5% Uranus EC 4000 times solution and 25% Fen Ling Wettable Powder 1500 times solution. 22% dichlorvos smoke agent 7.5kg / hm² smoke control can be selected in the protected area. It can also be controlled by using a normal temperature smoke machine. This insect is easy to develop resistance to medicines, and production control needs to pay attention to alternating medicines.

1. The implementation of non-happy food host vegetable rotation, to avoid the raw host melon, beans, eggplant and vegetable mixed planting sets. After harvest, thoroughly clean up the field weeds and plant residues, properly handle or high-temperature fermentation manure, reduce the source of insects in the field.<br>2. Cultivate insect-free seedlings and separate seedling and greenhouse production. Before seedling and transplantation, thoroughly smoke the residual insect mouth, the wind mouth with insect-proof net isolation, control the source of foreign insects.<br>3. Use hanging yellow plate booby-trapped or rack yellow basin booby-trapped. In the early stages of white powder lice, the yellow plate is coated with plastic film oil or mucosa glue, hanging in the shed room to trap insects, and regularly change the plastic film and adhesive. Also can be used in yellow basins filled with clean water, put a certain amount of washing powder, branched in the field, the height is slightly lower than the plant growth point, booby-trapped insects. Pay attention to regularly remove surface floating adult insects and change water.<br>4. Biological control. The white powder lice in the protected area is less than 50 head per 100 plants when the release of the libeth bee "black bee" 300-500 head, 10 days or so put 1 time, 3-4 times in a row, can effectively control the growth of white powder lice population, parasitic rate of more than 75%. During the release of the bee can be applied 25% to manganese wet powder 1000 times liquid, control white powder lice of adult insects, worms and eggs, without affecting the growth and reproduction of the libeth.<br>5. Drug control. Due to the generational overlap of white powder lice, all kinds of insect synopsis exist at the same time, there is no simultaneous killing of all insect-state agents. A drug control needs to be several times in a row, and according to the vertical distribution law of each insect state focus on the corresponding insect state, to ensure the effect of prevention and control. Optional use of 25% lice can wet powder 1000 to 1500 times liquid, or 2.5% Uranus milk oil 2000 to 3000 times liquid, 20% Confordo concentrated solvent 2000 to 3000 times liquid, 25% Aktai water dispersing agent 3000 to 5000 times liquid .5% of the agricultural dream milk 1 1 000 to 2000 times liquid, 25% Yujiaan wetpowder 800 to 1000 times liquid, 10% chlor-cyanide emulsion 2500 to 3000 times liquid, 3% Mobilan emulsion 1000 to 2000 times liquid.40.7% Les ben emulsion 800-1000 times liquid. In case of severe insect conditions, 2.5% Uranus milk oil 4000 times liquid and 25% lice can wet powder 1500 times liquid mix. In the protective area can be selected with 22% enemy smoke-fear agent 7.5kg/hm2 smoke control. It can also be used to apply the medicine of the room temperature smoke machine. This insect is susceptible to resistance to the drug, production prevention and control need to pay attention to rotation of alternating drugs

1. Implement rotation of non favorite host vegetables, and avoid mixed planting and interplanting of suitable host melon, beans, eggplant and fruit vegetables. After harvest, the weeds and plant residues in the field shall be cleaned thoroughly, and the compost shall be properly treated or fermented at high temperature to reduce the source of insects in the field.<br>2. Cultivate pest free seedlings and separate them from greenhouse production. Before seedling raising and transplanting, the residual insect population should be fumigated thoroughly, and the tuyere should be isolated with insect net to control the alien insect source.<br>3. Use yellow board or yellow basin. In the early stage of whitefly occurrence, the yellow board was covered with plastic film and coated with oil or mucilage, then hung in the shed to kill adults, and the plastic film was changed and coated with mucilage regularly. It can also be used to hold water in a yellow basin, put a certain amount of washing powder in it, put it in the field, slightly lower than the plant growth point, and trap and kill adults. Pay attention to regularly remove the floating adults and change water on the surface.<br>4. Biological control. When the adult population of whitefly is less than 50 per hundred plants in the protected area, 300-500 "black pupae" of aphid wasps are released, once in 10 days or so, and 3-4 times in a row, which can effectively control the population growth of whitefly, and the parasitic rate can reach over 75%. 25% manganin wettable powder can be applied to control the adults, nymphs and eggs of whitefly without affecting the growth and reproduction of aphids.<br>5. Chemical control. Because of the overlapping generations of whitefly and the existence of all kinds of insect forms at the same time, there is no agent to kill all insect forms at present. The control of a kind of insecticide needs to be carried out several times in succession, and the corresponding insect state should be focused on according to the vertical distribution law of each insect state to ensure the control effect. 25% chlorpyrine WP 1000-1500 times, 2.5% Uranus EC 2000-3000 times, 20% Kangfu duonong solvent 2000-3000 times, 25% aketai WP 3000-5000 times, 5% nongmengte EC 1000-2000 times, 25% youjia'an WP 800-1000 times, 10% cypermethrin EC 2500-3000 times, 3% mobiland EC 1000-2000 times 7% lotion cream 800~1000 times liquid spray. When the pest is serious, 2.5% Uranus emulsion 4000 times liquid and 25% chlorpyrine WP 1500 times liquid can be mixed. 22% dichlorvos smoke agent 7.5kg/hm2 can be used for smoke control in the protected area. The normal temperature smoke machine can also be used for chemical control. It is easy to produce resistance to insecticides, so it is necessary to pay attention to alternate drug use in production and control<br>