- Results:Fromlowtohighdegreeofresistance,formosquitoes,theinsecticidesaredeltamethrin,permethrin,DDVP,andforfliesaredeltamethrin,cypermethrin,permethrin,andDDVP;HouseflieshadevolutedhighresistancetoDDVPinYizhengandYangzhong.InYizheng,houseflieshadevol...
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