Least-squares means of multigenerational fecunditya following two-day exposure of M. persicae to sublethal concentrations of imidacloprid.

a24 h old nymphs were placed on treated potato leaf discs and fecundity of each resulting adult was recorded every 2 days until it died. In the succeeding generation, 5 randomly selected 24 h old nymphs were tracked and fecundity of the resulting adults was recorded every 2 days until they died. G0 is initial generation, G1 is progeny of G0, G2 is progeny of G1, and G3 is progeny of G2. G0 nymphs were exposed to treated discs for two days and all aphids were thereafter exposed to untreated leaf discs.bProgeny per adult data were log transformed before analysis. Backtransformed means are presented. Values followed by different letters are significantly different (LSD, α = 0.05). SEM values are not backtransformed.cMean total number of nymphs produced over four generations.dG0 nymphs did not survive to adulthood when treated with 25 µg L−1. This concentration was not included in the analysis.