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Because mosquitoes each region, for different drug sensitivity varies. For example, more afraid of mosquitoes Nanjing permethrin, dichlorvos and deltamethrin without fear, but in Wuxi, mosquitoes are more afraid of cypermethrin. Mosquitoes also general scope of activities in a few kilometers, so it has a strong regional resistance. Mosquito resistance in different regions and local farmland medication and other large drug use has a very close relationship. Such as the use of pesticides in the fields some more mosquitoes surrounding farmland will no longer afraid of the kind of insecticide, to kill the mosquitoes, it is necessary to use more higher concentrations of pesticides, which in turn resulting in increased resistance to the mosquito, the surrounding environment can also cause some pollution. The concentration of said makes sense! Some foreign products insect repellent ingredients low Zheng Yiping told reporters, another important reason for a not negligible, is different mosquito species in each region and foreign difference is large, the resulting composition ratio of insect repellent products are not the same, another place, it probably would failed. Jiangsu produced a repellent products company technical director Gu Yongjun said that the first ingredient in terms of insect repellent products at home and abroad the active ingredient is the same, if it is the kind of imported products to promote its 'pure natural non-pesticide' ingredients, then the repellent effect is certainly not good, can only be used within the mosquitoes themselves rarely environment. 'In terms of ingredients, there is a difference at home and abroad.' Gu Yongjun said that at home and abroad for the concept of 'mosquito' has some differences, many people claim domestic mosquito must 'go kill the fall,' while the foreign general requirements expulsion out on the line, so the same components within the scope allowed by national standards, the content of domestic products will be twice as many imported products. This has led to imports repellent products in domestic use, often produce feedback 'Nothing effect'. 'Domestic mosquito repellent products have been a high concentration of 'baptism', and how afraid these low concentrations of products?' Gu Yongjun told Modern Express reporter, such as a well-known foreign brand products Mosquito coils mosquito repellent ingredient only half the country. Mosquito war, and that the fight against drug resistance