Table 1 Chemical compounds identified by GC-MS in the headspace from undamaged, larvae-damaged and mechanical-damaged cabbage plants, in the wind tunnel.

Chemical compound	RT	CAS	MF	RI	HUC	HLD	HMD
Allyl isothiocyanate	4.13	57-06-7	C₄H₅NS	887 ^^a		*	*
α-pinene	5.3	80-56-8	C₁₀H₁₆	982		*	*
6-methyl-5-hepten-2-one	7.56	110-93-0	C₈H₁₄O	974	*	*
(Z) 3-hexenyl acetate	8.15	3681-71-8	C₈H₁₄O₂	1004	*	*	*
Limonene	8.84	138-86-3	C₁₀H₁₆	1017	*	*	*
Nonanal	11.29	124-19-6	C₉H₁₈O	1057	*	*	*
Decanal	14.78	112-31-2	C₁₀H₂₀O	1203	*	*	*
Benzyl isothiocyanate	18.93	622-78-6	C₈H₇NS	1278		*	*
Tetradecane	21.19	629-59-4	C₁₄H₃₀	1400	*		*
Geranyl acetone	21.73	689-67-8	C₁₃H₂₂O	1458 ^^b			*
Pentadecane	24.28	629-62-9	C₁₅H₃₂	1500	*
Hexadecane	27.24	544-76-3	C₁₆H₃₄	1600	*	*	*
Heptadecane	30.02	629-78-7	C₁₇H₃₆	1700	*	*	*
Octadecane	31.44	593-45-3	C₁₈H₃₈	1800 ^^c		*	*

RT = Retention Time, CAS = Chemical Abstracts Service, MF = Molecular Formula, RI = Kovats Retention Index, HUC = headspace from undamaged cabbage, HLD = headspace from larvae-damaged cabbage, HMD = headspace from mechanical-damaged cabbage. ^^aEngel et al.²⁰ ^^bLeffingwell and Alford²¹. ^^cChung et al.²² *Identified in the headspace.

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