Some biological aspects of sweetpotato whitefly (SPWF) were studied in relation to temperature under field conditions. Populations on cotton from two locations, different from their chemical control history, showed different developmental characteristics. Simulation models were constructed and validated for expressing the actual response in the field, however, a non-linear model showed a more accurate simulation than the linear one. Distribution characteristics of whitefly were also, studied and used to develop a presence-absence sampling procedure which conveniently represented the actual field data. The obtained results are considered as a prerequisite for successful management of whitefly in Egypt.