GFM Network News


Insecticide-resistant alfalfa weevils have been found in some fields in southern Alberta.

Resistant insect populations growing in southern Alberta

Insecticide-resistant alfalfa weevils are cropping up in alfalfa seed-growing regions, and beneficial bugs may be the answer

Insecticide-resistant insects have flown under the radar on the Canadian Prairies — but researchers are keeping an eye on a growing population of them in southern Alberta. “We don’t have very many insects that are resistant to insecticides here on the Prairies, so luckily, it’s not that widespread of an issue,” said Boyd Mori, researcher […] 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


No herbicide even comes close to glyphosate’s popularity — or the controversy it generates.

No ordinary herbicide — glyphosate keeps making headlines

The world’s most widely used herbicide will continue to be one of agriculture’s biggest newsmakers

Two things happened to glyphosate over the past 15 years — it got a lot more popular and a lot more unpopular at the same time. There’s no question that most farmers love it. Although the most recent estimates are a few years old, farm use of glyphosate soared in this century. A major European […] 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


Producers battling herbicide-resistant weeds will need to add diversity to their rotations, says federal research scientist Breanne Tidemann.

Saskatchewan herbicide resistance a heads-up for Alberta

More than half of fields surveyed had a resistant weed, with Group 1-resistant wild oat at the top of the list

Alberta’s herbicide-resistant weed survey is underway this summer, but the results from Saskatchewan paint a grim picture of what to expect here. “Since 2009, there’s been an 89 per cent increase in the land area affected by herbicide-resistant weeds,” said federal research scientist Breanne Tidemann. “We are in a fairly steep incline in terms of […] 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


This is not what you want to see — resistant kochia was thriving in this wheat field in southern Saskatchewan in 2015.

This is not good — triple-resistant kochia has entered Alberta

Glyphosate-resistant kochia was bad but there’s a new strain that’s much worse

Kochia, one of Western Canada’s most abundant and economically devastating weed species, has won another major battle in overcoming herbicide. This summer, the first known Group 4 herbicide-resistant kochia was identified in a durum wheat field in southwestern Saskatchewan. And samples currently being tested from a farm in southern Alberta are also suspected to be […] Read more

Did your spraying do the trick?

If weeds survived, you need to figure out what went wrong so you can avoid a repeat

Field scouting after herbicide application can lead to more successful crop production. “In the majority of cases, producers will find that the chemicals have done their job” said provincial crop specialist Mark Cutt. “However, in certain situations, field scouting may show the weeds weren’t properly controlled.” If so, figure out what went wrong. “A difference […] Read more