Baseline survey of herbicide resistance in Russian thistle (Salsola tragus L.) finds no resistance in Manitoba

Charles M. Geddes, Robert H. Gulden, Tammy Jones, Julia Y. Leeson, Mattea M. Pittman, Shaun M. Sharpe, Scott W. Shirriff, Hugh J. Beckie

Research output: Contribution to journalArticlepeer-review

Abstract

Recent confirmations of glyphosate-resistant Russian thistle (Salsola tragus L.) in Montana, Washington, and Oregon, warrant greater surveillance of herbicide-resistant Russian thistle in western Canada. A randomized-stratified survey of 315 sites in Manitoba was conducted in 2018 to determine the incidence of herbicide resistance in Russian thistle and other weeds sampled post-harvest. Russian thistle populations were collected from 14 of the 315 sites surveyed. None of these populations exhibited resistance to acetolactate synthase inhibitors (tribenuron/thifensulfuron), synthetic auxins (2,4-D ester or fluroxypyr), or glyphosate. This Manitoba survey of herbicide-resistant Russian thistle serves as a baseline for future surveillance efforts.

Original languageEnglish
Pages (from-to)246-249
Number of pages4
JournalCanadian Journal of Plant Science
Volume102
Issue number1
DOIs
Publication statusPublished - Feb 2022

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