Left to right: Weed specialists Jeanette Gaultier of BASF, Kim Brown of Manitoba Agriculture and Tammy Jones of Corteva participate in a panel at this year’s Manitoba Agronomists Conference, moderated by plant science professor Rob Gulden.

Building a culture of weed control

Experts highlight importance of collaboration between government and private sector agronomists to contain problem weeds

Collaboration between government and private sector agronomists to contain problem weeds and herbicide resistance is key, Manitoba Agronomists Conference panel says.


Waterhemp digs deeper foothold in Manitoba

Waterhemp digs deeper foothold in Manitoba

Easy to mistake for other pigweeds and infamous for herbicide resistance, waterhemp continues to spread in Manitoba

More municipalities in Manitoba have had confirmed waterhemp infestations, and Manitoba Agriculture is warning farmers to be vigilant against the noxious weed.

Nodding thistle is largely found in southwestern Manitoba.

Don’t yield to weed invaders

It’s important to stop Palmer amaranth and waterhemp in their tracks

Invasive Species Awareness Week occurs during the last week of April in Manitoba. The Manitoba Weed Supervisors Association (MWSA) recognizes this week by highlighting a few of the invasive plants considered to be a significant threat to the landscape of our province. Many of these invasive species are mistaken for wildflowers, but unlike native wildflowers,

Male (left) and female (right) waterhemp plants.

The gaps in Palmer amaranth, waterhemp prevention

There may be more getting done than producers realize, but more resources couldn’t hurt

No one wants Palmer amaranth or waterhemp to become bigger weed worries in Manitoba, and there’s work focused on making sure that doesn’t happen, but local knowledge is still thin on the ground. The two boogeymen of the weed realm were recent subjects of a successful resolution brought before the Keystone Agricultural Producers. The motion, by ag diploma students


Waterhemp (seen here) and Palmer amaranth have well-earned reputations for prolific seed production and herbicide resistance.

Farm organization takes aim at noxious weeds

Action targeting waterhemp, Palmer amaranth greenlit at KAP advisory council meeting

Keystone Agricultural Producers will set its sights on two emerging noxious weeds: waterhemp and Palmer amaranth. A resolution brought forward by University of Manitoba agriculture diploma students during KAP’s March advisory council meeting March 27 aims to give more support to farmers to beat back Manitoba’s growing problem. Why it matters: Waterhemp and Palmer amaranth

Once waterhemp pokes its head above the canopy, it becomes easily identifiable.

The problem with pigweeds

Differentiating different species, including major threats like Palmer amaranth and waterhemp, can be challenging

Scouting for waterhemp is difficult but critical, Manitoba Agriculture weed specialist Kim Brown told producers during her presentation at St. Jean Farm Days Jan. 10. “You’re going to hear a lot about this in the next few years because this is just going to become a bigger and bigger problem, but I really believe we can get out

Producers are being urged to diversify their soybean stands.

Seeding one soybean variety a ‘mistake’

Ontario soy expert says growers should diversify to at least three varieties

Glacier FarmMedia – Horst Bohner is convinced that farmers should plant more than one variety of soybeans. If they don’t, they are making a “mistake.” “As a basic starting point, I think every grower should seed at least three varieties. Every year. As a minimum. Hopefully more than that,” said Bohner, a soybean specialist for


Kochia is among the weeds that should be on farmers’ radar this fall.

Early harvest opens options for fall weed control

Spraying tips to use once the combine is parked

[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.

Waterhemp peeks out among soybeans.

Waterhemp on the rise

Manitoba’s list of affected municipalities keeps growing

Manitoba’s ag sector is trying to hold the line against big yield-killing threats like waterhemp and Palmer amaranth. Unfortunately, the number of municipalities where waterhemp has been found just grew by two. “Waterhemp and Palmer amaranth are Tier 1 weeds regulated under the Noxious Weeds Act. They must be destroyed when they’re found,” said Manitoba Agriculture weed extension specialist Kim