GFM Network News


The lowdown on wild oat resistance

Currently, 69 per cent of wild oats on the Prairies have some type of herbicide resistance, and there are limited control options if the weed has developed both Group 1 and 2 resistance. In light of this, the Resistant Wild Oat Action Committee is working to develop increased awareness, beginning with a series of infographics. […] Read more

Farming Smarter’s field day in early July had an unusual aspect — attendees — who heard from several speakers, including researcher Lewis Baarda.

Forget the silver bullet, bring out the arsenal against kochia

Study using multiple methods to control one of the most dangerous weeds on the Prairies

If it’s a one-on-one battle, put your money on kochia. The pernicious weed is not only a prolific seed producer, thrives in harsh conditions, and spreads its progeny far and wide, it’s also a master when it comes to developing resistance to herbicides. So producers are urged to use a variety of ‘best management practices’ […] Read more


When this year’s edition of the Blue Book comes out in spring, take a bit of time to explore “hidden gems of information,” says crop specialist and co-author Harry Brook.

Crop protection Blue Book is popular, but not fully appreciated

Co-author says annual crop protection manual has valuable info on modes of action, resistance, and other topics

The Blue Book is known for its comprehensive list of pesticide products for use on major field crops, but the crop protection manual has “vast amounts of additional information,” says its co-editor. “These pages contain the hidden gems of information that are valuable to producers,” said provincial crop specialist Harry Brook. One example is herbicide […] Read more

This Alberta field is being overrun by kochia — likely a type resistant to two or even three modes of action. Canada already ranks third in terms of herbicide-resistant weed and the problem is quickly worsening, says a leading expert.

In the weeds: Canadian farmers can’t stay ahead of herbicide resistance

The problem is huge, rapidly getting worse, and non-chemical weed control is becoming a necessity

Farmers won’t be able to spray their way out of this — Canada is now third in the world when it comes to weeds able to survive pesticides that used to kill them. “We’re quickly being overrun by herbicide-resistant weeds,” said federal research scientist Charles Geddes. “There have been difficult herbicide-resistant weeds in the past, […] Read more


Pesticide makers create resistance website

The organization representing pesticide makers has a new online tool to help minimize herbicide resistance on farms. Three out of five Canadian growers are now dealing with herbicide-resistant weeds, Paul Hoekstra, a senior official at Syngenta and chair of CropLife Canada’s resistance management committee, said in a news release. Manage Resistance Now promotes using a […] Read more

The sight of wild oats escaping weed control is increasingly common in Alberta and could get a lot worse, says crop expert Harry Brook.

Millions of Alberta acres have resistant weeds

Kochia and wild oats top a long list of resistant weeds that are now present in Alberta, says crop specialist

When it comes to herbicide resistance, producers should be looking for trouble. The ongoing spread of resistant weeds means producers should be actively scouting for it, said provincial crop specialist Harry Brook. “We now have glyphosate resistance in kochia in southern Alberta and it continues to spread,” said Brook. “These should serve as a wake-up […] Read more


Wild oats is currently resistant to the most number of herbicide groups of any weed.

‘Wake-up call’ needed for resistance

Provincial crop expert says it’s time to stop pretending it’s not ‘a huge issue’

Weed resistance has been an issue in crop production for many years, but is coming to the forefront as increasing numbers of weeds are no longer responding to herbicides. “Most producers are aware of the issue, but unless it affects them directly, don’t see it as a huge issue,” said provincial crop specialist Harry Brook. […] Read more

“These new harvest weed seed control options should be looked at seriously.” – Neil Harker

Herbicide resistance becoming the new reality in Alberta, says weed expert

Researchers in Lacombe are investigating mechanical ways to deal with resistant weeds, but there’s no ‘silver bullet’

Some Alberta farmers are in denial about weed resistance — and they’re in for a rude awakening, says a federal weed scientist. “We spend over $12 an acre on average, and about $500 million a year on wild oat control alone (on the Canadian Prairies),” said Neil Harker. “That’s the weed we put the most […] Read more


The basics of combating resistant weeds are simple — rotate herbicides by group; scout; employ good sanitation methods and diverse rotations, said Hugh Beckie.

Herbicide resistance is everywhere you look

This year it’s Alberta’s turn to be surveyed by Ag Canada — but researchers already know the news won’t be good

If you’ve found herbicide-tolerant weeds in your field, you’re not in the minority. Weed resistance is increasing worldwide, so it’s really important that Prairie growers understand growing herbicide tolerance, says one of the country’s top resistance experts. “Group 2 really overshadows all the other groups in terms of weed resistance,” said Hugh Beckie, a research […] Read more

Minnesota probes Palmer amaranth’s sudden appearance

Chicago | Reuters — Minnesota has launched an investigation to find the source of seed mixes contaminated with weed seeds after the aggressive, herbicide-resistant Palmer amaranth weed was found on 30 areas planted in a federal conservation program. The weed grows very fast, reaching up to eight feet in height and can hold back commercial […] Read more