Neil Harker of Agriculture and Agri-Food Canada

Brace yourself — winter annual weeds worse than usual this year

Dry conditions earlier this spring gave winter annuals an edge and for some growers, it’s too late to manage them

Reading Time: 2 minutes The dry conditions of early spring could lead to a spike in winter annual weeds. “Winter annuals could be a problem,” said Neil Harker, research scientist with Agriculture and Agri-Food Canada. “We really haven’t had a lot of spring moisture, so the ones that were already established, like stinkweed and flixweed and winter annual cleavers, […] Read more

Cleaver seedlings. (Photo courtesy Canola Council of Canada)

No time like now to scout for resistance: CCC

Grain and oilseed growers making weekend plans are advised that herbicide-resistant weeds have way fewer places to hide right now. Any weeds that lived through pre-seeding burnoff or post-emergent spraying — where other weeds have clearly died — are best caught early, the Canola Council of Canada said in a release Friday. “It takes 14-21 […] Read more


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 […] Read more

fababean crop

Faba bean acreage is soaring — and so is knowledge about growing them

Herbicide sensitivity and heat susceptibility were two issues, and lygus bugs seem to find them tasty

Reading Time: 2 minutes Alberta is coming off of a pretty good year for faba beans and that brought with it some valuable lessons learned, says an Alberta Agriculture and Rural Development researcher. “This year we saw acreage go from 30,000 to close to 80,000,” said Robyne Bowness, pulse research scientist in Lacombe. “We had more farmers growing faba […] Read more


Annual sow thistle has just been identified as glyphosate 
resistant in the U.S.

Farmers are the front line for slowing herbicide resistance

Weed scientist says producers need to extend rotations, not overuse glyphosate, and employ the most effective tank mixes

Reading Time: 2 minutes Herbicide resistance is like a forest fire — only you can prevent it. That was the message from weed scientist Linda Hall, who said producers need to step up to prevent a situation like that in the U.S. where glyphosate-resistant weeds are now epidemic in corn, soybeans and cotton crops. “It’s easy to say that […] Read more

Agronomist Doug Moisey shows the deformed brace root system of corn plant injured by phenoxy herbicides like 2,4-D or MCPA.

Weed competition costing corn growers yield

Corn growers have limited options for controlling Roundup Ready 
canola in their crops — but Group 27 herbicides offer a ‘good opportunity’

Reading Time: 3 minutes Doug Moisey wouldn’t go so far as to say corn is the “wuss” of the cropping world, but it sure doesn’t put up much of a fight against weeds. “Wuss may be a strong word, but when it comes to weed control, it’s very critical,” said the DuPont Pioneer area agronomist at Farming Smarter’s field […] Read more


Alberta area map showing weed resistance.

Wild oat herbicide resistance is on the rise

Moving to longer crop rotations and reducing herbicide use will help manage the rapid rise in herbicide resistance in wild oats

Reading Time: 2 minutes It’s already bad, but the problem of herbicide-resistant wild oats in Alberta will get a lot worse in a hurry if farmers don’t change their ways, says an Agriculture and Agri-Food Canada scientist. Today, 37 per cent of Western Canada’s cropland has herbicide-resistant weeds, with resistant wild oats in 28 per cent of fields, Neil […] Read more