Fig. 1.

Mean number (±SE) of settled F. occidentalis second instar larvae on either control leaf discs, treated leaf disc or elsewhere in the bioassay unit. Dual choice bioassay with leaf discs treated with a methyl jasmonate or b cis-jasmone (both at 1 %) and a control leaf disc. Settlement preference recorded at 30 min, 1, 2, 3, 4, 5 and 6 h after the release of groups of 10 F. occidentalis second instar larvae per unit, 12–14 groups tested