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Tag Archives herbicides

horizontal image of five round steel grain bins sitting in a yellow canola field under a very cloudy sky in the summer.
Canola, Crops

New blackleg resistance labels for canola

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The canola industry has agreed to voluntarily enhance blackleg resistance labels on canola seed. Seed companies will still use the current R, MR, MS, and S labels. But they will also start adding information indicating which major genes are present in a blackleg-resistant variety. Each blackleg-resistant variety leans heavily on a single major gene for […] Read more
To date, AAFC’s Dr. Hugh Beckie has not seen Palmer amaranth in the Prairies. However, he says, 
“if it did come up it would be through the floodwater in the Red River Valley.”
Crops, Features

Palmer amaranth continues to spread north

Producers should learn to spot the tall, fast-growing 
weed before it becomes a problem

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Amaranth is extremely nutrient-rich. It was important to the Aztecs, and is still cultivated in South America and Mexico. It germinates easily, grows rapidly and produces huge numbers of seed. But the crop that sustained the Aztec economy famously wreaked havoc on the American cotton industry, and is now affecting corn and soybean producers in […] Read more
Kochia not confirmed ‘triple resistant’ — yet
Crops, Features

Kochia not confirmed ‘triple resistant’ — yet

Producers should take action against kochia based on threat severity

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Triple-resistant” kochia — kochia resistant to herbicides in Groups 2, 4 and 9 — hasn’t yet been confirmed in Alberta despite recent media reports, says Hugh Beckie, a weed scientist with Agriculture and Agri-Food Canada. Surveys have turned up two-way resistant kochia, specifically Group 2 plus Group 4, and Group 2 plus Group 9 resistant weeds, but […] Read more
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
Producers focus on herbicide rotation
Crops, Features

Producers focus on herbicide rotation

Farmers figure it’s better to avoid herbicide resistance than manage around it

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John Berger and Spencer Hilton are southern Alberta farmers doing all they can as part of their crop and herbicide rotation programs to reduce the risk of weeds developing herbicide resistance. Berger, who along with son Brad, crops about 5,000 acres near Nanton, south of Calgary, actually stockpiled some particularly effective chemistries when Monsanto sold […] Read more
Researchers found no adverse effect on oat yield with the glyphosate application. In fact, 
they saw a slight yield bump and significantly greater test weight.
Crops, Features

Oats not affected by pre-harvest glyphosate

Despite buyers’ concerns, variety and environment have more impact than glyphosate

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In the spring of 2015, Grain Millers announced they wouldn’t buy oats that had been treated with pre-harvest glyphosate. Christian Willenborg was alarmed. “I was alarmed because I really hadn’t heard of an issue. I hadn’t seen an issue,” said Willenborg, assistant professor at the University of Saskatchewan and editor-in-chief of the Canadian Journal of […] Read more
Crops, Features

Dicamba drift gets real

Will new spray chemistry lower the risk of dicamba drift in 2017?

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In 2016, so many U.S. farmers spaying dicamba had spray drift problems that the U.S. Environmental Protection Agency released a compliance advisory in August citing “an unusually high number of reports of crop damage that appears related to misuse of herbicides containing the active ingredient dicamba.” The EPA advisory said: “Extension experts across the country […] 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
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
Weed researchers are studying several options to control herbicide-resistant weeds. Researchers need to test each product or practice alone, and in combination.
Crops, Features

Use diversity to fight resistant weeds

The latest in using integrated weed management tools for hard-to-manage weeds

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A three-year study in Arkansas has found that a combination of fall management practices and herbicide use are the most effective ways to control herbicide-resistant Palmer amaranth, when combined with a herbicide program. But Arkansas isn’t Alberta. So what can western Canadian farmers learn from this study? More and more often the message in weed […] Read more

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