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VIDEO: Taking the fight to kochia in North Dakota
Crops, News

VIDEO: Taking the fight to kochia in North Dakota

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There are a number of problem weeds that growers often contend with each season, but kochia is one weed problem in particular that’s of growing concern – and not only here on the Prairies, but also south of the border. Jason Hanson, a crop consultant in North Dakota, travelled to St. Jean Farm Days earlier
Kochia in a canola field. Photo: File
Crops

Crop-killing weeds advance across US farmland as chemicals lose effectiveness

Losing battle with weeds adds pressures to farmers already stressed by inflation, extreme weather

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Crop-killing weeds such as kochia are advancing across the U.S. northern plains and Midwest, in the latest sign that weeds are developing resistance to chemicals faster than companies including Bayer BAYGn.DE and Corteva CTVA.N can develop new ones to fight them.
Kochia is among the weeds that should be on farmers’ radar this fall.
Crops

Early harvest opens options for fall weed control

Spraying tips to use once the combine is parked

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[UPDATED: Oct. 11, 2023] An early harvest gives farmers the opportunity to get ahead of weeds for next season, says Manitoba Agriculture weed specialist Kim Brown. Weeds have had ample time to grow after harvest, making them prime targets for herbicide. Why it matters: As harvest winds down, attention turns to field preparation for 2024.
Quick adapting and designed to spread, kochia seems biologically primed to pick off the punches farmers throw at it.
Crops, News

On the ropes against kochia

Growers face a formidable foe. Fast mutations and efficient seed spread are a tough one-two combination

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Kill it with fire. That was the gist in 2018, after a photo of post-spray kochia in Saskatchewan made the rounds on social media. The image showed a swath of dead, brown plants. That made the single, green plant right in the centre stand out even more. There was a collective recoil from farmers in
Field patches where kochia is dominant are candidates for mowing or, in the case of herbicide resistant plants, hand-weeding before it sets seed.
Crops

Strike early when fighting kochia in canola

Kochia has few means of control, so know the options

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Glacier FarmMedia – Kochia is one of the fastest-spreading and most resistant weeds common in canola. The key is to control it before it sets seed, experts say, and that means striking when it’s small. Herbicide resistant kochia has been a management headache for growers across the Prairies. Pre-seed burnoff is the first tool in
“You need to make every drop of the herbicides count while they’re still working.” – Kim Brown-Livingston.
Crops, News

Herbicide resistance can’t be ignored

A weed control strategy will encompass the entire production system

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Herbicide resistant weeds have been present in Manitoba since the 1980s but they are now becoming a critical issue that cannot be ignored. Kim Brown-Livingston, Manitoba Agriculture’s weed specialist, called it the biggest problem facing producers. More resistance is cropping up and no new modes of action have been available on the Prairies in the
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,
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
Kochia's fuzzy leaves makes treating it with a herbicide more of a challenge.
News, Other, Weather

Dry year adds to spray considerations

Manitoba’s weather lately means weeds have toughened up and herbicides may have an uphill battle if weeds aren’t growing vigorously

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This year has brought its own quirks to weed control. Kochia is out in force again this year, provincial weed specialist Tammy Jones said. The plants’ fuzzy leaves create their own challenges for herbicide contact, even if the kochia is not showing glyphosate resistance. Glyphosate-resistant kochia has become a significant headache and cause for worry

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