Comparative Efficacy of Different Insecticides Alone and Along With Adjuvant against Cotton Whitefly Bemisia tabaci in Multan, Pakistan

摘要

Cotton is a major crop in Pakistan contributing towards foreign exchange earnings. WhiteflyBemisia tabaci is considered the most destructive insect pest of cotton worldwide. In Pakistan differentinsecticides are widely used to control this pest, however whitefly developed resistances against insecticides.The addition of Alkyl ether sulphate sodium (An adjuvant) is commonly used to increase the efficacy ofinsecticides, in Pakistan. Little is known about the use of adjuvant as a mixture of different insecticides.In present study, the efficacy of seven different insecticides (Polo 500EC, Mospilan20SP, Fuzin 25 WP,Movento 240 SC, Curate 50 WDG, Priority 10.8 EC and Danadim Progress 40 EC) were evaluated againstnymphs and adult whitefly in the cotton field. The data revealed that among seven three insecticides Polo,Danadim and Mospilan were statistically more effective against whitefly. We observed that the addition ofAlkyl ether sulphate sodium an agricultural adjuvant significantly increase the efficacy of all the seven testedinsecticides. So it is concluded that by the addition of adjuvant, Polo, Danadim and Mospilan can be effectivelyused to control whitefly in the cotton field.