Outline Silverleaf Whitefly (Bemisia tabaci) is a major pest of cotton. This is because it produces sticky honeydew that contaminates lint, reducing the quality of cotton. Silverleaf Whitefly can be controlled with insecticides, but if mismanaged - whitefly will develop resistance. Each year Silverleaf whitefly are collected from cotton production regions and screened for resistance to insecticides, e.g. Admiral, Pegasus and Talstar. The results of this research support Insecticide Resistance Management Strategies (IRMS) to prolong the life of the currently used insecticides