Table 3.

Attraction of Whittleia retiella males to bait series 2 at four different field observations in 2017 (Obs 1–3) and 2018 (Obs 4–5)

Compound	Bait composition
Isoprop-C5DA		100		10	30	50
(S)-2b-C5DA			100	100	100	100
Blank	BL
Obs 1 N = 4			●			●
Obs 2 N = 1			●			●
Obs 3 N = 6			●			●
Obs 4 N = 2*
Obs 5 N = 10			●	●	●	●

Isoprop-C5DA = 1-methylethyl (5Z)-dec-5-enoate and (S)-2b-C5DA = 1S-methylpropyl (5Z)-dec-5-enoate. Numbers represent μg loading of different synthetic compounds on the baits. Blank baits were loaded with n-hexane (hx) only. Black dots represent baits visited by one or more males at each observation, respectively. N = number of approaching males at each observation. At observations 1–4, the baits were displayed in parallel with bait series 1 (see Table 2)

*No visits from males to bait series 2 at this occasion, but to bait series 1, which was displayed in parallel