Response of the oilseed rape pests, Ceutorhynchus assimilis and Psylliodes chrysocephela, to a mixture of isothiocyanates

Ceutorhynchus assimilis Payk., the cabbage seed weevil, and Psylliodes chrysocephala L., the cabbage stem flea beetle, are both important pests of oilseed rape (Brassica napus L.) in the UK. In electrophysiological experiments their antennae perceived 3-butenyl, 4-pentenyl and phenylethyl isothiocyanate (NCS), volatile metabolites of glucosinolates present in rape (Blight et al.,1989). This study investigated the behavioural responses of the insects to a mixture of these three NCSs RESP-12019