Insecticide efficacy on Bemisia tabaci mortality and development in cotton

Greenhouse studies were performed in the Fall of 2018 and Summer of 2020 using two colonies of Bemisia tabaci from Georgia and Florida. Six insecticides commonly used for whitefly control (Knack - pyriproxyfen, Admire - imidacloprid, Venom - dinotefuran, Coragen - chlorantraniliprole, Exirel - cyantraniliprole, and Sivanto - flupyradifurone) were tested representing four different modes of action (IRAC groups 7C, 4A, 4A, 28, 28, and 4D, respectively). Results showed that all insecticides were capable of significantly reducing adult numbers on infested plants as well as reducing egg counts in the Florida population. Control was more variable in the Georgia population with only a few active ingredients reducing adult and nymph numbers and none reducing the amount of eggs.