D Dose response curve for sugar inhibition using the indicated concentrations of saponin with 100 mM sucrose on L4 sensilla (n ≥ 8). E Sample traces from (D). The asterisks indicate significant differences from that of the control detected by a single-factor ANOVA with Scheffe's analysis as a post hoc test to compare two sets of data (**P < 0.01). The error bars represent SEMs. 