Figure 3

Activity profiles of detoxification enzymes in pyrethroid resistant Sitophilus spp weevils. Activities of the enzymes cytochrome P450 (A), glutathione-S-transferases (B) and general esterases (C) measured in adults insects of the S. zeamais SzSusc strain (i.e., the pyrethroid susceptibility pattern strain) and of the weevils strains that were resistant (i.e., the S. zeamais SzPyrSel strain and the S. oryzae SoPyrTol and SoPyrR strains) to pyrethroid insecticides. Each bar corresponds to the mean of five independent assays (±SE). Histograms under the same horizontal bar do not differ statistically (Tukey test, P < 0.05).