Crop Damage and Control of Cabbage Seedpod Weevil on Canola.

The cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae) is highly destructive to canola and other brassicaceous seed crops especially in North America and Europe. Feeding damage by cabbage seedpod weevil could result in significant reduction in canola yield and seed quality. Adults feed on flower buds causing racemes to abort and bear few pods. This experiment was conducted to determine the efficacy of bifenthrin and determine effective timing application to control cabbage seedpod weevil on winter canola. Jetton variety was used in the experiments conducted at the Alabama A&M University Winfred Thomas Agricultural Research Station during 2006-07 growing season. Bifenthrin was applied at two dosage rates (4.0 and 6.0 fl. oz/acre; 0 is control) at various stages of plant development. There was no difference in the efficacy of bifenthrin  at test dosages used. Bifenthrin was most effective against cabbage seedpod weevil when applied on canola at flower bud stage.