Quick adapting and designed to spread, kochia seems biologically primed to shrug off the punches farmers throw at it. |  Manitoba Agriculture photo

The fall weed control checklist

Glacier FarmMedia – Attention to fall weed control is needed as harvest nears its end. Speaking during a Manitoba Agriculture webinar Sept. 25, provincial weed specialist Kim Brown singled out weeds that thrive in salinity, which concerned many producers this spring. Effective fall weed management is essential to maximize crop yields and maintain soil health. […] Read more

Manitoba's provincial weed specialist  was seeking an answer to the white cockle question because several farmers in Manitoba found the weed in their hay fields this summer. | File photo

Is white cockle toxic for cattle? Nobody knows

WINNIPEG — Kim Brown was on a quest in August and part of September. Manitoba’s provincial weed specialist was searching for an answer to the following question: is white cockle, a weed sometimes called white campion, safe for cattle to eat? Brown asked weed scientists and livestock nutrition experts with Agriculture Canada and at universities […] Read more

It’s important that producers choose the right product and timing for pre-harvest herbicides.  |  File photo

Pre-harvest prep needs herbicide management

Verify product acceptance with buyers because even registered products may not be acceptable in certain markets

Glacier FarmMedia – With harvest on the horizon or already underway, pre-harvest management strategies are useful to maximize yield. To achieve crop dry-down, weed control and facilitate timely harvesting, product choice is important. Many generic products are available, but Manitoba Agriculture weed specialist Kim Brown recommends using brand-name products such as Roundup, Heat or Reglone, […] Read more


White cockle is a noxious weed that gets into hay crops.  |  Roy Lewis photo

Possibly toxic weed found on Manitoba hay fields

WINNIPEG — Earlier in August, Robert Grieger was cutting an alfalfa field on his farm, but then he decided to stop after about 80 acres. Grieger was concerned because the quarter section was infested with a strange weed he couldn’t identify. Related story: Watch for noxious tall buttercup and white cockle There was nothing on […] Read more

Attendees work to identify various weeds at Weed Seedling Identification Day in Carman May 22.  |  Don Norman photo

Early weed identification means easier control

Misidentifying a young weed can make managing it much harder and more expensive later in the growing season

Glacier FarmMedia – Different weeds might warrant different responses if they’re found in a field. The problem is, they might look frustratingly similar in their early stages. “You need to be going out for waterhemp or Palmer amaranth before they’re four inches tall,” said Manitoba Agriculture weed specialist Kim Brown. Those species have provoked a […] Read more


Agriculture Canada’s Breanne Tidemann says kochia appears to be spreading to areas of Alberta where it wasn’t seen previously.  |  Agriculture Canada photo

Outlook focuses on problem Prairie weeds

Glacier FarmMedia – The past few seasons have been a challenging time for farmers on the Canadian Prairies. Extreme heat, lack of precipitation and steep increases in production costs have caused some sleepless nights for many producers. As if those weren’t enough to contend with, another potential threat to crops will soon rear its ugly […] Read more

Two of the 11 new products are meant to help producers combat kochia. | Screencap via gov.mb.ca

Kochia control among additions to guide

Several new herbicides have been added to Manitoba Agriculture’s 2024 Guide to Field Crop Protection. “We haven’t had a new herbicide group in over 40 years,” said Manitoba Agriculture weed specialist Kim Brown. “However, we do have some new products that are within the existing groups.” Two of the 11 new products are meant to […] Read more

Male (left) and female (right) waterhemp plants.  |  Photo supplied by OMAFRA

The gaps in Palmer amaranth, waterhemp prevention

No one wants Palmer amaranth or waterhemp to become bigger weed worries than they already are in Manitoba, and there’s work currently focused on making sure that doesn’t happen, but locally based knowlege is still thin on the ground. The two boogeymen of the weed realm were recently the subject of a successful resolution brought […] Read more


Until recently the weed was found mainly on the edges of fields, but some farmers are now finding it throughout a crop. | File photo

Prairie producers urged to watch for fleabane

BRANDON — Farmers across Western Canada are frequently told the same message: keep an eye out for unusual or unfamiliar weeds. For the last few years, the worrisome weed in Manitoba has been waterhemp. The species of pigweed was first confirmed in Manitoba in 2017 and has since spread across the province. The weed is […] Read more