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Traps baited with WRC without pentanoic acid (A), WRC without guaiacol (B), WRC without δoctalactone (C) and WRC without geranylacetone (D). PA, GU, DO and GE represent pentanoic acid, guaiacol, δ-octalactone and geranylacetone respectively. Error bars signify 95% CI of the percentage reduction in catches. *P<0.05, **P<0.01 and ***P<0.001.
