In 2012, the aphids in the agricultural areas should select pesticides to prevent them: chemical emergency control techniques were used in areas with an average density of 5 heads/m2 or more and an average density of 20 heads/m2. Commonly used pesticides include organophosphorus or pyrethroid pesticides such as malathion oil. In areas where the contiguous area is more than 500 hm2, the promotion of GPS aircraft navigation precision application technology is advocated, and the separation control can be adopted. In areas with a contiguous area of ​​less than 500 hm2, the plant protection professional team can be used to carry out ground emergency control using large-scale application equipment. Ground emergency prevention and control should focus on the promotion of ultra-low-volume spray technology. In high-crop crop fields such as reeds, sugar cane and corn, as well as complex environmental areas, in order to reduce labor intensity, new technologies for smoke machine control should be promoted. When using a fog machine for prevention and control, it should be carried out in the case of low pressure such as early morning or evening. Wallpaper Paint Roller,Wallpaper Flating Roller,Wallpaper Flatter Paint Rollers Co., Ltd. , http://www.nspaintroller.com