Mean walking time (± SD; n = 50) of experienced females of Theocolax elegans in a four chamber olfactometer. LIGO: areas above Petri dishes with grains infested by weevil larvae from which larvae, faeces, and egg plugs had been removed, MIGO: areas above Petri dishes with grains infested by adult S. zeamais males from which weevils and faeces had been removed, FIGO: areas above Petri dishes with grains infested by unmated adult S. zeamais females from which weevils and faeces had been removed, AG: artificially damaged grains, 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).