In the third instar, the body wall is very thin, and there are many micro-hairs on the body wall. The epidermis on the micro-hair area is very thin, and the medicine can easily penetrate this layer. At this time, the body size is small and the food intake is small. Large, light damage, small areas of activity, weak resistance to drugs (drug resistance), so the appropriate time to determine the control of pests, should be controlled before the peak of 2 to 3 years of medication, and some should be controlled before and after the peak period of egg hatching medication, The best control effect can be achieved. Hydro Aqua Peeling Beauty Face Equipment,Oxygen Facial Equipment,Hydra Machine Peel,Led Light Facial Machine Xi'an Double H Health Technology Co., Ltd , https://www.dhextract.com