Multiple herbicide-resistant kochia [ Bassia scoparia (L.) A.J. Scott] is a growing weed management concern for farmers in the Canadian prairies. A randomized–stratified survey of 319 sites Alberta was conducted 2021 to determine frequency and incidence glyphosate, fluroxypyr, dicamba resistance samples four nine years after previous rounds surveys. Kochia exhibiting were found at 78%, 44%, 28%...

Field, greenhouse, and laboratory experiments were conducted at the Montana State University Southern Agricultural Research Center, Huntley, MT, USA, in 2012 and 2013, to evaluate the effectiveness of various postharvest-appliedherbicideson late-season control, fecundity, seed viability, andprogenyfitnessofKochia scoparia (kochia) in wheat stubble. Paraquat þ atrazine, paraquat þ linuron, and p...

Recent confirmation of dicamba-resistant kochia [Bassia scoparia (L.) A.J. Scott] in Alberta warrants investigation resistance to other commonly used synthetic auxin herbicides like fluroxypyr. A randomized-stratified survey 305 sites was conducted 2017 determine the status fluroxypyr-resistant kochia. Overall, 13% populations were fluroxypyr-resistant. Only 4% both fluroxypyr- and dicamba-resi...