Abstract
A simulation model (REPO–PERM) was developed to predict the rate of resistance development in Colorado potato beetle, Leptinotarsa decemlineata (Say), using field data on permethrin selection to initialize a number of ecological and genetic parameter values. Model explorations indicated that sex–linked traits, like permethrin resistance in Colorado potato beetle, respond to directional selection faster than autosomal traits, and that the distribution of individuals in the plant canopy can influence selection intensity and the rate of adaptation. Model predictions for rates of adaptation to permethrin under conditions typical of Virginia and North Carolina are consistent with documented development of resistance in these areas.
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