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Tag Archives Herbicide-resistant weeds

Among the most serious weed resistance concerns on the Prairies are wild oat and green foxtail, both seen here in this photo from Manitoba’s Interlake region in 2020.
Crops, Features

How to scout for herbicide-resistant weeds

What to look for and when, plus prevention tips and an update on herbicide-resistant downy brome in canola

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Get out and scout. Next to diversifying your rotations and herbicide selection as much as possible, it’s a critical part of managing herbicide-resistant weeds on your farm in 2022. Scouting is important because without an accurate and thorough picture of what resistant species exist in your fields, you can’t make the best management decisions. More […] Read more
Waterhemp.
Crops, Features

Watch for expansion of waterhemp, Palmer amaranth and kochia in 2020

Serious weed threats continue to advance and grow, farmers urged to test for resistance

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For growers in Manitoba, waterhemp is a serious threat in 2020, reports Tammy Jones, a Manitoba Agriculture weed specialist. This weed was present last year in both eastern and central Manitoba, and Jones’ “biggest fear” is that more will be found in the province this year. And, as reported by Canola Council of Canada (CCC), […] Read more
The kochia plant here being pollinated by this bee could well be resistant to glyphosate.
Crops, News

Get back to basics to fight kochia

Using multiple and rotating modes of action can reduce selection pressure

By
In recent years, kochia has become a real issue across the Prairies. Kochia loves hot, dry weather, and as a prolific seed producer, the tumbleweed-shaped weed can spread quickly. What’s worse, kochia has a growing history of resistance, which can make it a tricky weed to manage. Agriculture and Agri-Food Canada research scientist Charles Geddes […] Read more
The best time to deal with a weed such as kochia is when it's small.
Features, Pulses

In-crop mechanical weed control

Controlling weeds mechanically can help overcome Group 2 resistant weeds in pulses

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Group 2 resistant weeds are an annual problem for lentil producers. But there are a few outside-the-box methods that may give farmers better control than herbicide alone. University of Saskatchewan grad student Alex Alba led a study looking at three in-crop mechanical weed control methods, including: Tine harrows; Rotary hoe; and, Inter-row tillage. Alba used […] Read more
Hugh Beckie was on hand during Nufarm’s field day at Ag-Quest’s Saskatoon location. Beckie is holding a GPS collar that researchers can attach to kochia plants to track how the weed disperses seeds as it tumbles across the prairie.
Crops, Features

Herbicide-resistant weeds: don’t be in denial

Herbicide resistance is a growing problem that all Prairie farmers need to address

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Dealing with resistant weeds is a little like dealing with alcoholism, according to a Nufarm executive. The first step is to acknowledge that you’ve got a problem. Lachie McKinnon heads North American business development for Nufarm, and is also the Canadian manager. McKinnon shared thoughts on managing herbicide resistance based on his experience working in […] Read more
Kochia in a wheat field.
Crops, Features

Sociology and herbicide-resistant weeds

Think weed management strategies are all about agronomy? There are other factors

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Would you tell your neighbour how to farm? Not likely. On the other hand, what if this reluctance to “stick your nose in” was creating a real barrier to the adoption of practices that could help slow down the spread of herbicide resistant weeds? Scientists have a word for this way of thinking. They call […] Read more
VIDEO: “Old soil-applied” solutions to fight herbicide resistance
Crops

VIDEO: “Old soil-applied” solutions to fight herbicide resistance

Crop Diagnostic School: Know your target weed issues... and your problem weeds of the past

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To help keep herbicide-resistant weeds at bay, some older soil-applied products are rejoining the fight. At the 2015 Crop Diagnostic School, Jeanette Gaultier, pesticide use specialist with Manitoba Agriculture, Food and Rural Development, talks about which herbicide-resistant weeds producers should watch for and what they need to consider before choosing a herbicide for their situation.
palmer amaranth weeds in a field
Crops

Herbicide-resistant weeds changing farm practices

Resistant weeds are driving U.S. farmers to actions like manual weeding

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Arkansas has been ground zero for herbicide-resistant weeds. For instance, the state is second only to Australia in the amount of herbicide-resistant ryegrass in wheat. “We’re actually running out of herbicides, making it difficult for us to even grow wheat in Arkansas, because of the levels of resistance that we have,” said Dr. Bob Scott. […] Read more
family standing in front of a Christmas tree
Canola, Cereals, Crops, Features

Farming was the right choice

After 40 years of farming, Blair Rempel knows he made the right choice when he chose to come back to the farm

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Blair Rempel has been farming for almost 40 years. The Nipawin area producer and seed grower earned his diploma in agriculture at the University of Saskatchewan, in 1976. He considered other careers but always came back to agriculture. “The things I found attractive was a certain degree of independence and the satisfaction of building your […] Read more

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