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Tag Archives weed control

Cleavers can have a negative impact on canola and pulse crops.
Crops, Features

Controlling cleavers without quinclorac

With quinclorac off of the herbicide menu, farmers will need to use other tools

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Last spring, the Western Grains Elevator Association (WGEA) and the Canadian Oilseed Processors Association (COPA) advised growers that they would not accept quinclorac-treated canola grown and harvested in 2016. The reason for this announcement was to make sure that grain shipped to customers in other countries remains in compliance with regards to Maximum Residue Limits […] Read more
Blooming rapeseed field at sunset
Canola, Crops, Features

Back to the agronomy basics in canola

Experts advise growers to focus on quality seed and nitrogen before less conventional inputs

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Canola growers have been asking agronomists questions about promoted products. Do they work? And if so, are they worth the additional cost? Two researchers, Murray Hartman, oilseed specialist with Alberta Agriculture and Forestry, and Neil Harker, research scientist, weed ecology and crop management, Agriculture and Agri-Food Canada, conducted a study to test the inputs that […] Read more
Once you suspect resistance, sending the seed for testing can confirm or allay your fears.
Crops, Features

Are there resistant weeds in your fields?

The answer to this question is probably yes. Testing can give you a definite answer

By
Every season more farmers face the challenge of herbicide-resistant weeds. “Herbicide resistance is the genetic capacity of a weed population to survive a herbicide treatment that, under normal use conditions, would effectively control that weed population,” said Dr. Jeanette Gaultier, weed specialist with Manitoba Agriculture. It’s sometimes described as evolution happening at an accelerated pace […] Read more
A high clearance sprayer on a field in a prairie landscape
Canola, Crops, Features

Spraying your fungicide in “the zone”

With Bayer’s new “Zone Spray,” farmers can skip the fungicide in some parts of the field

By
If Warren Bills has his way, farmers will have a better way to forecast sclerotinia than the old wet boots and weather test. “We believe there is a better way to manage the risk of that disease and the returns growers get when they spray,” Bills told agronomists and industry at Bayer’s Ag Summit in […] Read more
Agriculture Canada researcher Bob Blackshaw, right, with Univeristy of Alberta master’s student Mat Vercaigne talk to producers during a field day in Lethbridge on “forgotten” herbicides that can help manage resistance.
Crops, Features

Old, new products deliver multi-modes of action

The challenge is to hit weeds with two or more active ingredients to reduce resistance

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Old chemistry, new formulations, multiple modes of action — these are all elements farmers can include in their weed control toolbox heading into 2017, say weed researchers and crop protection specialists. One of the most important elements these days for either preventing or managing herbicide resistance in weeds is to approach control with multiple modes […] Read more
Cleavers can be tricky because they are both a spring and winter annual.
Crops, Features

Timing is key to whipping weeds

It’s easiest to kill weeds when they’re actively growing. Make sure you know when that is

By
Whether you’re telling a joke or treating a weed, timing is critical. And as anyone who has failed at weed control will confirm, it’s no laughing matter. Once you let weeds gain a foothold they can soon get out of hand, so it’s crucial to identify the life cycle of the weeds in your field […] Read more
leafy spurge
Features, Livestock

Training cattle to eat leafy spurge

With leafy spurge acres spreading, it’s time to bring on some new tactics

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There’s a reason why “spurge” rhymes with “scourge.” The last economic impact analysis of the noxious weed in Manitoba, which came out in 2010, concluded that leafy spurge costs the province $40.2 million every year due to lost grazing capacity, costs of chemical controls on roadsides and indirect costs. In 2010, there were roughly 1.2 […] Read more
Palmer amaranth.
Crops, Features

Stem Shock: new herbicide in development

A new mode of action based on RNA could soon be killing a weed near you

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It’s been over 20 years since chemical companies released a new mode of action in herbicides. But a B.C.-based company is cooking up a whole new type of herbicide. “We use a different mode of action for the actual killing of the plants than a lot of traditional herbicides. Most herbicides, by reducing the specific […] Read more
Herbicide resistance is a global problem that requires a local solution, says
Kate Sanford Mitchell. Farmers, researchers and industry from North America 
to Australia are trying to find effective ways to control resistant weeds.
Crops, Features

Resist herbicide resistance

Farmers don’t create herbicide resistance, but management practices can encourage it

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While many farmers think about herbicide resistance in Australia, the U.K. and the U.S., the reality is that it’s a Canadian problem, too, says Kate Sanford Mitchell. We need to listen to extension specialists who are sounding the alarm about herbicide resistance, she adds. “Weed resistance is a global problem that requires a local solution,” […] Read more
Kochia in a wheat field.
Crops

Costs of disease and weed resistance

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In Western Canada, a number of factors have helped keep disease resistance low, including variability of hosts, pathogens, environmental conditions, crop rotation and judicial use of fungicides. However, there is resistance. Weed resistance in both grass and broadleaf weeds has been identified in fields since 1988. Resistance has been identified to many herbicide groups including […] Read more

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