Glyphosate-resistant kochia is the latest warning sign for Manitoba farmers.

Herbicide resistance quietly growing problem in Manitoba

Multi-pronged weed control strategies that go beyond chemicals are urged by researchers

Farmers may lose the war against herbicide-resistant weeds if they don’t start using other forms of control besides chemicals, a University of Manitoba weed scientist says. Herbicide resistance, common in other countries, is starting to appear in Western Canada and it’s just a matter of time before it becomes prevalent here too, Rob Gulden warns.

Editorial: Peace and prosperity

Maybe it’s time for agriculture to climb down from its wartime footing. For decades now it’s been a battle as farmers fight nature, red in tooth and claw, to prevent crop damages and loss. It’s hardly surprising when you consider the historical context out of which our modern Green Revolution agriculture sprang. It took off


Clubroot figured out canola in Alberta. Then it began destroying canola.

Editorial: Long-term plans essential

The farms that are winners tomorrow will be run by farmers who are proactively understanding and defusing production problems today. There are a number of growing issues that could be a disaster tomorrow, but growers can prevent them if they’re committed to doing the right thing now. The best example, and the one that’s a

Monsanto aims to give farmers better information in weed resistance fight

Monsanto aims to give farmers better information in weed resistance fight

The company is countering its competitors who tout their herbicides 
as tools in the fight to avoid herbicide-tolerant weeds

Monsanto Canada is fighting what it says is “fear-based rhetoric floating around about farming practices and (weed) resistance in Canada.” In a recent full-page advertisement in several farm newspapers, including the Manitoba Co-operator, Michiel De Jongh, Monsanto Canada’s president and general manager, said Monsanto should’ve addressed herbicide-resistant weeds sooner. “When you began to battle herbicide


kochia weeds in a farmer's field

Tank mixing weed killers helps delay herbicide-resistant weeds

But don’t forget to rotate crops, including fall seeded and perennials, 
advises AAFC’s Hugh Beckie

Tank mixing two herbicides with different modes of action targeting the same weed is a good way to delay the development of herbicide-resistent weeds, a study by weed scientists at the University of Illinois and United States Department of Agriculture concludes. “We don’t say that mixing is the end-all solution,” study co-author Pat Tranel of



U.S. EPA to require weed-resistance restrictions on glyphosate

Reuters — U.S. regulators will put new restrictions on the world’s most widely used herbicide to help address the rapid expansion of weeds resistant to the chemical, Reuters has learned. The U.S. Environmental Protection Agency (EPA) confirmed it will require a weed resistance management plan for glyphosate, the key ingredient in Monsanto’s immensely popular Roundup

VIDEO: Glyphosate resistance on Manitoba fields

VIDEO: Glyphosate resistance on Manitoba fields

At least one local farmer has resorted to removing kochia by hand

Glyphosate is arguably the world’s most important herbicide, but glyphosate resistant weeds are on the rise. Two Manitoba fields have glyphosate and group 2 resistant kochia. To delay glyphosate resistance farmers should reduce glyphosate use when possible. That’s the message Manitoba Agriculture, Food and Rural Development weed specialist Nasir Shaikh gave farmers Aug. 7 during the Manitoba