Mean walking time (± SD; n = 50) of experienced females of Theocolax elegans in a four chamber olfactometer. E: areas above Petri dishes with 1000μl extract from the heads and thoraxes of 3rd–4th instar weevil larvae, S: areas above Petri dishes with 1000 μl of sodium phosphate alone, C: areas above control Petri dishes. Bars with different letters are significantly different at P < 0.05 (Friedman ANOVA followed by Wilcoxon-Wilcox-test for multiple comparisons).