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Tag Archives herbicide resistance

Think of weed control like boxing. It’s better over time to know the combinations that lead to wins, rather than hoping for a lucky knockout punch.
News

Weed control can’t count on knockout punch

The chemical control era is waning, so adoption of new combinations is very important

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Herbicides have been the No. 1 weapon against weeds since the 1940s. They’ve been effective but the last few decades have shown that genetics are a more powerful force than chemistry. Weeds are gaining genetic resistance to herbicides faster than new chemistries can be developed. “In addition to all of these new cases we’re seeing,
Students bring KAP resolution on kochia
News

Students bring KAP resolution on kochia

Perennial forages can help stamp out weeds, but lost revenue needs to be offset, ag students say

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A group of agriculture students say farmers should be incentivized to combat herbicide-resistant kochia by growing perennial forages. The weed is spreading faster than ever in Manitoba, and something must be done “before we have to return to historic practices of hand-picking weeds,” University of Manitoba student Richard Davy told Keystone Agricultural Producers members on
Kochia has been difficult to control during the prolonged drought of the past several years.
News

Kochia control waning in North Dakota

Two popular products also widely used in Manitoba seem less effective

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A North Dakota State University study showed that some kochia populations in western North Dakota likely have developed resistance to commonly used pre-plant burndown herbicides. For many years, no-till farmers have used Aim (carfentrazone) and Sharpen (saflufenacil) either just before or just after planting to control emerged kochia and other annual weeds. In Manitoba, carfentrazone is the active ingredient in Aim EC,
Editorial, Op/Ed

Editor’s Take: Many tools

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Everything changed for agriculture after the Second World War. As the world went to war, the sector was largely driven by horsepower. By war’s end, it was poised for rapid mechanization and the Green Revolution. which brought about increased use of fertilizer and herbicides, all products of wartime research efforts. The widespread use of nitrogen
“There are waterhemp populations, mostly in the States, that are resistant to nine different herbicide groups. At that point, you have no options left.” – Kim Brown Livingston.
Crops, News

The end of the chemical era draws near for farms

The future of weed control is going to require a more balanced approach

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Chemical herbicides have long been the jewel in the crown of weed management, but after seven decades of use, natural selection is turning back the calendar. Herbicide resistance in weeds was first discovered in the 1980s and the problem has steadily increased. With no new chemistries introduced in more than 30 years, it’s clear that
A new research chair aims to give Manitoba farmers new and better tools to fight weeds in their fields.
News

New research chair aimed at weeds

Farmers’ dollars help kick start new research chair position at U of M

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A new University of Manitoba research chair is taking the fight against weeds to the next level. The Manitoba Crop Protection Chair in Weed Management is dedicated to research that will support integrated weed management strategies. In late September, the university announced the appointment of Dilshan Benaragama to the new role. “This is a great
Wild oat a growing resistance challenge
Crops, News

Wild oat a growing resistance challenge

Keep an eye on your fields this summer and be ready to tackle the problem when you see it

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If you rely solely on crop protection products to fend off wild oats, you’re not going to like the eventual bottom line. Herbicide-resistant strains of the weed are going to mean you’ll eventually run out of luck. It’s not a new problem, but every year it gets just a little bit more concerning. “Resistance is
It’s assumed almost all kochia in Manitoba is already resistant to Group 2 herbicides.
Crops, News

Herbicide resistance keeps on rising

Mother Nature keeps outsmarting the available crop protection products

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Every year weed scientists with Agriculture and Agri-Food Canada continue their herbicide-resistant weed surveys — and every year they find new places with weeds poking through the crop canopies in direct defiance of the spraying. This is because Mother Nature is better at genetics than we are at chemistry so our herbicides just can’t keep
Herbicide resistance is a growing concern due to glyphosate-resistant kochia (seen here) and the yet small but aggressively spreading waterhemp.
News

Former weed specialist back on the job

Battling weed resistance will be hard work, says Kim Brown-Livingston

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Kim Brown-Livingston says she’s optimistic as she takes the role of provincial weed specialist. “We have a great future,” she said. “We’re going to continue on, and our farmers are doing a really good job of it now.” Brown-Livingston previously held the role of weed specialist from 1998 to 2013 before moving on to work
In this photo from Mike Cowbrough’s October 2019 Pest Patrol column in Country Guide, light-green waterhemp plants approach the top of a soybean canopy after two ineffective applications of glyphosate. (Supplied photo)
Crops

Group 27 herbicide resistance arrives in Canada

Mesotrione-resistant waterhemp confirmed in Quebec

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A persistent and fiercely competitive weed that has developed resistance to several herbicide groups since its arrival in Canada is now the first in the country to fight off a Group 27 product. Quebec’s Reseau d’avertissement phytosanitaire (RAP) last Friday reported a patch of waterhemp with resistance to mesotrione herbicide in the Haut-Richelieu municipality, in

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