Beckie, H.J.Leeson, J.Y.Thomas, A.G.Andrews, T.Brown, K.R.Van Acker, R.C.2018-08-062018-08-062005-02-17http://hdl.handle.net/10388/9498In 2002, 150 fields were randomly selected throughout the ecoregions of Manitoba and surveyed for grass and broadleaf weeds resistant to Group 1 (ACCase inhibitor) or Group 2 (ALS inhibitor) herbicides. One-third of surveyed fields had a herbicide-resistant weed biotype. Two biotypes new to western Canada are Group 2-resistant green foxtail and redroot pigweed. Of producers with resistant biotypes, 10% or fewer were aware of their occurrence.enAttribution-NonCommercial-NoDerivs 2.5 Canadaherbicide resistancegreen foxtailredroot pigweedwild oatPoster Presentation