First report: spotted knapweed (Centaurea stoebe) resistance to auxinic herbicides

Amy R. Mangin; Linda M. Hall

doi:10.1139/cjps-2016-0008

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Amy R. Mangin,¹ Linda M. Hall^1,*

¹Agricultural, Food and Nutritional Sciences, University of Alberta, Edmonton, AB T6G 2E1, Canada.

^*Corresponding author: Linda M. Hall (email: linda.hall@ualberta.ca).

Abstract

Spotted knapweed is a prohibited noxious weed that is primarily controlled with auxinic herbicides. A population collected from a managed rangeland in East Kootenay, BC, was highly resistant to both clopyralid and picloram, with R/S ratios of >25 600 and 28, respectively. This is the first report of resistance in spotted knapweed.

Citation Download Citation

Amy R. Mangin and Linda M. Hall "First report: spotted knapweed (Centaurea stoebe) resistance to auxinic herbicides," Canadian Journal of Plant Science 96(6), 928-931, (27 May 2016). https://doi.org/10.1139/cjps-2016-0008

Received: 7 January 2016; Accepted: 25 April 2016; Published: 27 May 2016