Baseline susceptibility of oriental fruit moth larvae to chlorantraniliprole (Rynaxypyr) and other reduced-risk insecticides

To determine baseline susceptibility of oriental fruit moth (OFM) to chlorantraniliprole, spinetoram, novaluron, and acetamiprid neonates were placed on diet blocks containing one of a range of concentrations of the candidate insecticides. Mortality was assessed after 96 hours. Two populations were tested, a long-term lab colony from Rutgers University and a colony established from a southwestern Illinois field population in the summer of 2007. Environmental conditions for bioassays were 16:8 L:D photoperiod, 60%RH, and 26.8C. Data were analyzed by probit and/or logit models, and LC50 and LC90 values were estimated using POLO (LeOra Software, 2007). Bioassays were ongoing at the time of submission of this abstract.