The cotton aphid, Aphis gossypii, and the banded-winged whitefly, Trialeurodes abutilonea, were noteworthy “secondary” pests during 2001, and populations of both pests dramatically increased in transgenic Bt cotton (NuCOTN33B). Our trials addressed the effectiveness of several new insecticides when compared with existing materials. Overall, the newer insecticides, acetamiprid (Assail) and thiamethoxam (Centric), provided excellent control of both aphids and whiteflies, while the performance of some existing compounds was inadequate.