Manitoba field survey of herbicide-resistant weeds
Date
2005-02-17
Authors
Beckie, H.J.
Leeson, J.Y.
Thomas, A.G.
Andrews, T.
Brown, K.R.
Van Acker, R.C.
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Poster Presentation
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Abstract
In 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.
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Keywords
herbicide resistance, green foxtail, redroot pigweed, wild oat
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Part Of
Soils and Crops Workshop