Volatile organic compounds of hoary stock are responsible for suppressing downy mildew of grape in an intercropping system

Table 2 Relative contents (%) of antimicrobial compounds in post-and pre-flowering hoary stock volatile organic compounds (VOCs)

Identical compounds	Post-flowering	Pre-flowering	Unique compounds	Post-flowering	Pre-flowering
Ethyl-2-methylbutyrate	8.211	5.516	β-farnesene	2.316	0
Phenethyl alcohol	1.597	0.102	Eugenol	2.066	0
Tridecane	1.236	1.611	Methyl phenylacetate	0.857	0
α-pinene	0.983	1.200	β-caryophyllene	0.518	0
2,6-di-tert-butyl-4-methylphenol	0.333	0.616	Anethol	0.448	0
Ethyl benzoate	0.238	0.210
(E)-ethyl-2-methyl-2-butenoate	0.233	0.174
Limonene	0.180	0.204
Amyl acetate	0.163	0.163
1,8-cineole	0.144	0.116
1,1-diethoxy-ethane	0.133	0.117
β-pinene	0.059	0.081
Total relative content (%)	13.51	10.11		6.205	0