Glyphosate-resistant kochia is spreading across southern Manitoba. So this spring more kochia weeds will survive the first herbicide treatment and more growers will want to know: did the sprayer miss this patch of weeds, or are they resistant to glyphosate? A rapid test is now available to answer that question. “I just spent money to […] Read more
Tag Archives herbicide resistance
Wild oat resistance persists
Wild and free: that’s beginning to describe wild oats rather well. The “wild” is a given, right in the name, and the “free” is embodied in the weeds’ freedom from in-crop herbicide harm. “We have wild oat seed lots that can have blanket resistance to both Group 1s and Group 2s, meaning they’re resistant to […] Read more
Prairie fields rife with resistant weeds
The number of weeds that have developed resistance to one or more herbicides is jumping in Western Canada. Fifty-seven percent of Canada’s largest cropping province now has fields infested with herbicide tolerant weeds. Random weed surveys conducted by researchers on 400 fields have found that more than 19 million acres in Saskatchewan likely carry one […] Read more
Wild oats resistance could become next quandary for prairie farmers
Western Canadian farmers will have a tough time battling the next glyphosate resistant weed, says an expert. Wild oats is the most likely candidate to follow resistant kochia, according to a risk assessment model developed by Hugh Beckie, a weed scientist with Agriculture Canada. The same model successfully forecast kochia as Western Canada’s first glyphosate […] Read more
Glyphosate: too much of a good thing spells doom
WASHINGTON, D.C. — Stephen Powles is not optimistic about the future of glyphosate in North America. Powles, a farmer and weed scientist at the University of Western Australia, says the herbicide might have a shorter life span than farmers imagine. “I’m going to make here a very bold prediction: glyphosate will be driven to redundancy, […] Read more
Trouble looms with shorter canola rotation, warns expert
An Agriculture Canada researcher issued a cautionary message last week to an audience of canola industry members. Neil Harker said the two-year canola rotation that dominates the Prairies comes with inherent risks that threaten future production of the crop: increased levels of disease and pests and the breakdown of variety resistance. “I think we’re at […] Read more
Tackling weed resistance contentious
Compensating farmers who overused glyphosate is ‘rewarding bad management,’ says scientist
BALTIMORE, Md. — Carol Mallory-Smith, a weed scientist from Oregon State University, couldn’t help herself. Two experts on a panel discussing herbicide resistance during the Weed Science Society of America’s annual meeting in Baltimore Feb. 4-7 had just suggested the U.S. government offer financial incentives to growers who adopt alternative practices as part of an […] Read more
