herbicide resistance Archives - Page 4 of 6

Herbicide-resistant wild oats are still controlled by glyphosate — for now.

Now’s the time to find resistant weeds

Herbicide-resistant weeds are on the rise and pre-harvest is a good time to find them

By Allan Dawson August 13, 2020

Delaying the onset of herbicide-resistant weeds isn’t a lost cause. In fact the more vigilant a farmer is the more success they’ll have, says Ingrid Kristjanson, a farm production extension specialist with Manitoba Agriculture and Resource Development (MARD). With farmers checking crop maturity as harvest grows near, it is also a good time to scout

Three current or emerging herbicide-resistant weed threats in Manitoba: Palmer amaranth (left), waterhemp (top right), and kochia (bottom).

Editorial, Op/Ed, Other

Editor’s Take: The cancer of herbicide-resistant weeds

By Gord Gilmour January 16, 2020

I’m a redhead. Or at least I once was, before I started seriously going grey. Along with the inability to hide in a crowd, I also got the pale skin that makes sunscreen and a hat a critical part of my summertime coping tool box. It’s also led me to be statistically more likely to

Provincial weed specialist Tammy Jones says leaving small patches of survivors can quickly result in a huge problem as new and highly competitive herbicide-resistant weeds have arrived.

Crops, News

Losing the war on weeds

Tammy Jones has been doing the math on where herbicide resistance is taking Manitoba farmers and the numbers are grim

By Gord Gilmour January 16, 2020

Tammy Jones spent four hours last summer wrestling with about 300 waterhemp plants in a Manitoba field, yanking them out of the ground by the roots and carrying them to the field edge for destruction. The provincial weed specialist was trying to demonstrate the value of controlling what might seem to be small patches of

The researchers started with a single seed of Amaranthus hypochondriacus, their test plant, and grew generations of the plant to produce the seeds they needed for their experiments.

Did you know?, News

New mutations for herbicide resistance rare

Most resistance seems to come from pre-existing genetic conditions

By Manitoba Co-operator Staff June 11, 2019

After exposing more than 70 million seeds to a soil-based herbicide, researchers at the University of Illinois were not able to find a single herbicide-resistant mutant. Though preliminary, the findings suggest that the mutation rate in amaranth is very low, and that low-level herbicide application contributes little — if anything — to the onset of

Manitoba Agriculture’s 2018 in-season survey now documents 12 municipalities with glyphosate-resistant kochia.

Crops, Local news

Glyphosate-resistant kochia confirmed in 12 municipalities in 2018

Testing is the only way to confirm how widespread glyphosate-resistant kochia is in Manitoba

By Lorraine Stevenson January 21, 2019

When Tammy Jones’ phone rang last year as often as not it was farmers fed up with kochia spreading in their fields. The Manitoba Agriculture weeds specialist dubbed the tumbleweed ‘weed of 2018,’ in a talk at St. Jean Farm Days last week. “We saw a lot of it,” she said. “It felt like anyone

A depiction of the herbicide molecule (top), which inhibits an enzyme (bottom) that plants need.

Did you know?, News, Other

Neutralizing weeds’ defence system

Researchers identify a new mechanism to battle herbicide resistance

By Ucla Release July 31, 2018

Plants and unseen soil micro-organisms all need precious space to grow. And to gain that space, a microbe might produce and use chemicals that kill its plant competitors. But the microbe also needs immunity from its own poisons. By looking for that protective shield in micro-organisms, specifically the genes that can make it, a team

Webinar Australia: Chemical company BASF has launched a free resource for farmers on herbicide resistance, including lessons from Australia.

Crops

Transplanting herbicide-resistance advice from Down Under

Australia has something to teach Canadian farmers about herbicide resistance, at least, according to BASF’s latest online resource

By Alexis Stockford June 19, 2018

On the other side of the world, farmers have learned some valuable insights about herbicide resistance that you can share. In Australia they’ve long been fighting this battle and the land Down Under has learned some tough lessons. The International Survey of Herbicide Resistant Weeds found Canada is third in the world in terms of

Editorial, Opinion

Editorial: In the weeds

By Gord Gilmour May 17, 2018

Canada has a brewing weed problem, and we’re not talking about the looming legalization of cannabis. This is an older problem, but with a modern twist, in the form of constant selection pressure from chemical control products and the resulting herbicide-resistant weeds. Manitoba farmers have the dubious distinction of being among the first in the

Glyphosate-resistant kochia is still rare in Manitoba, but the time to prevent it from spreading is now.

Crops, Local news

ON THE GROW: Herbicide resistance is spreading quickly

Manitoba Agriculture is warning about new and looming threats when it comes to resistant weeds

By Alexis Stockford May 17, 2018

Manitoba’s provincial weed specialist is urging a harder line on herbicide resistance. “Zero tolerance is really where you need to be,” Tammy Jones of Manitoba Agriculture said. “Controlling your escapes. Control them with mowing; control them with tillage. If you really want to, control them with hand weeding, but if you have resistant wild oats

Agronomist Peter Johnson doesn’t like Manitoba’s tight rotations.

Crops, Other

Tight crop rotations in the hot seat

Rotations were a major point as discussions turned to blackleg during this year’s BASF Knowledge Harvest

By Alexis Stockford March 21, 2018

It’s all but impossible to eliminate sclerotinia and blackleg from the field, but it’s also a mistake to assume crop genetics alone will manage the problem. BASF technical service specialist Colleen Redlick said farmers need to broaden their approach during the BASF Knowledge Harvest in Brandon earlier this winter. Resistance breakdown, something the industry has

Daily Network News

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Pea, lentil outlooks have some positive signals – Penner

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