At present, in the fall, vegetables have begun to enter greenhouses, greenhouses and other protected areas. The occurrence of whitefly will increase. It is mainly harmful to melons, beans, solanaceous vegetables, sucking juice causes the leaves to turn green and yellow, while secreting a lot of honey, not only affect the photosynthesis, but also cause coal mycosis, production must strengthen prevention. Reasonably intercropping the first place in the greenhouse is best to plant low-temperature vegetables such as celery, leeks, spinach, cilantro, etc., which are not eaten by whitefly, and reduce the planting area of ​​cucumbers and tomatoes. In the vicinity of the greenhouses, it is also necessary to avoid the cultivation of cucumbers, tomatoes, eggplants, beans, and other whiteflour-like vegetables. Low-temperature freezing uses the timing of late autumn, winter, and early springtime to clear the fallen leaves in the shed, uncover the plastic film, and use the low temperature below 0°C to freeze for 5 days to freeze the whitefly adults and nymphs. In the process of capping insect-proof net vegetables, as long as the temperature outside the shed is still suitable for survival of whiteflies, pest control nets should be stamped to prevent whitefly from entering the shed. Trapping or repelling whitefly has a strong tendency to yellow, yellow traps can be trapped and killed in sheds. Place 30 pieces per acre and place them between the rows to make them equal to plant height. Silver gray film can also be used to cover the film, repelling whitefly. The agent smokes and kills 80% of dichlorvos emulsifiable concentrate EC with a suitable amount of sawdust per acre 300 to 400 milliliters, apportions 15 to 20 heaps with a dark fire to ignite, and smokes smoke in a closed greenhouse at night, once every 7 to 10 days, continuously kills 2 to 3 Times. Massage Ball,Yoga Roller Stick,Massage Relax Bar,Yoga Massage Ball Ningbo Prestigeplus Commodity Co.,Ltd , https://www.prestigemedics.com