REAGENT or RESOURCE	SOURCE	IDENTIFIER
Biological samples
Jacobaea vulgaris	Seeds were collected from Europe, Australia, North America west coast and North America east coast	N/A
Tyria jacobaeae	Pupae were collected from the dunes of Meijendel, the Netherlands	N/A
Mamestra brassicae	Eggs were collected from a lab culture of Wageningen University31	N/A
Cotesia popularis	Cocoons of C. popularis were obtained from T. jacobaeae larvae collected in the dunes of Meijendel, the Netherlands	N/A
Chemicals, peptides, and recombinant proteins
E-2-hexenal	Sigma-aldrich	CAS: 6728-26-3
Z-3-hexen-1-ol	Sigma-aldrich	CAS: 928-96-1
E-2-hexen-1-ol	Sigma-aldrich	CAS: 928-95-0
Z-3-hexenyl acetate	Sigma-aldrich	CAS: 3681-71-8
n-octane	Sigma-aldrich	CAS: 111-65-9
nonanal	Sigma-aldrich	CAS: 124-19-6
Pentadecane	Sigma-aldrich	CAS: 629-62-9
β-ocimene and trans-ocimene	Sigma-aldrich	CAS: 13877-91-3
E-β-caryophyllene	Sigma-aldrich	CAS: 87-44-5
E-β-farnesene	Sigma-aldrich	CAS: 18794-84-8
α-humulene	Sigma-aldrich	CAS: 6753-98-6
benzaldehyde	Sigma-aldrich	CAS: 100-52-7
1-nonene	Sigma-aldrich	CAS: 124-11-8
decanal	Sigma-aldrich	CAS: 112-31-2
1-pentadecene	Sigma-aldrich	CAS: 13360-61-7
Methylene chloride	Honeywell	CAS: 75-09-2
Nonyl acetate	Sigma-aldrich	CAS: 143-13-5
Deposited data
Datasets and statistical analyses	This paper	https://doi.org/10.5061/dryad.fxpnvx0rk
Software and algorithms
R v4.03	R development core team, 2021	https://www.r-project.org