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Traps baited with WRC without pentanoic acid (A), WRC without guaiacol (B), WRC without δ-octalactone (C) and WRC without geranylacetone (D). PA, GU, DO and GE represent pentanoic acid, guaiacol, δoctalactone and geranylacetone respectively. Error bars signify 95% confidence interval of the mean catch.
