An Investigation of Sustainable Management of Carrot Weevil in the Holland Marsh, Ontario

The carrot weevil (CW), Listronotus oregonensis (LeConte), is a major carrot pest in Canada. Larval CW feeding renders carrot roots unmarketable. The efficacy of the CW IPM program was evaluated. Field trials and analysis of historical data determined CW monitoring did not effectively relate to CW damage and CW has likely developed phosmet resistance. Field trials showed that foliar, seed treatment, or in-furrow insecticide applications generally failed to reduce CW damage, although foliar applications of novaluron and cyantraniliprole showed some efficacy. Throughout field trials, damage from... Mehr ...