Chemical Composition and Antimicrobial Activities of Essential Oils from Nepeta cataria L. against Common Causes of Food-Borne Infections

Table 1

EO composition (%) of catnip (N. cataria) at three stages of harvest.

Component	RI^a	Vegetative (%)	Floral budding (%)	Full flowering (%)
α-Pinene	936	2.7	3.1	4.6
Sabinene	957	0.0	0.0	0.15
β-Pinene	978	0.8	1.13	1.64
1-Cyclohexen-1-yl-methyl ketone	980	0.5	0.6	0.7
Triplal	1023	0.1	0.4	0.4
Thymol	1294	0.4	0.4	0.57
4a-α,7-α,7a-β-Nepetalactone	1332	55	58	55.03
4a-α,7-β,7a-α-Nepetalactone	1342	30.06	31.1	31.2
trans Caryophyllene	1430	1.1	2.7	2.1
α-Humulene	1446	0.82	0.92	0.87
11-Dodecenol	1500	0.84	0.69	1.1
Spathulenol	1580	0.6	0.4	0.3
Caryophyllene oxide	1569	0.5	0.2	0.12
6,10-dimethyl-2-undecane	1907	0.2	0.0	0.25

^aRetention index.