Least-squares means of the instantaneous rate of increase (ri) and total number of aphids per plant after 21 days following infestation of M. persicae on to potato plants treated with sublethal concentrations of imidacloprid in a greenhouse.

aData were square root transformed before analysis. Backtransformed means are presented. Values followed by different letters are significantly different (LSD, α = 0.05). SEM values are not backtransformed.