Inhibition of Salmonella Inhibition of P. roqueforti Combination Inhibition zone (diameter, mm)>a Classificationb Inhibition zone (diameter, mm)a Classificationb Cinnamon 20.66 ± 4.45a,b Strong 25.4 ± 4.48)c Strong Cinnamon-Spearmint 21.14 ± 4.37a Strong 40.21 ± 4.61)a Strong Cinnamon-Thyme 20.90 ± 3.15a,b Strong 34.78 ± 3.38)a,b Strong Cinnamon-Eucalyptus 19.83 ± 1.36a,b Strong 33.11 ± 2.54)b Strong Cinnamon-Peppermint 16.60 ± 0.19a,b,c Moderate 40.22 ± 1.53)a Strong Lime-Cinnamon 18.95 ± 0.71a,b Moderate 38.15 ± 1.41)a,b Strong Lime-Spearmint 11.37 ± 0.84c,d Slight 8.95 ± 0.37)e Slight Lime-Thyme 13.71 ± 2.45b,c,d Moderate 9.77 ± 1.18)e Slight Lime-Eucalyptus 9.12 ± 1.35d Slight 7.03 ± 0.20)e None Lime-Peppermint 9.53 ± 1.04d Slight 7.00 ± 0.00)e None Thyme-Spearmint 8.58 ± 0.70d Slight 16.96 ± 0.96)d Moderate Thyme-Eucalyptus 9.27 ±1.04d Slight 10.09 ± 1.31)e Slight Thyme-Peppermint 9.55 ± 0.89d Slight 10.98 ± 0.70)e Slight Spearmint-Eucalyptus 7.00 ± 0.00d None 9.88 ± 0.84)e Slight Spearmint-Peppermint 8.58 ± 0.34d Slight 9.57 ± 0.72)e Slight aInhibition zone diameters are average ± standard deviation) of three measurements. Diameters with a different letter are significantly different (p<0.05) from each other. bClassification for inhibition: none (diam<8 mm); slight (8 mm<diam<11 mm); moderate (11 mm<diam<16 mm); strong (diam>16mm).

Table 4: Inhibitory activity of 1:1 combinations of essential oils against Salmonella Typhimurium and Penicillium roqueforti