kochia

New Group 14 tank mix partner may be on horizon

A Japanese firm’s new chemical isn’t like the other PPO inhibitors

Not yet registered in either Canada or the U.S., the Japanese active ingredient-in-waiting could be needed sooner than later, because many growers in Saskatchewan and Alberta are struggling with herbicide-resistant kochia.



kochia in saskatchewan

Kochia’s expanding herbicide resistance puts pressure on no-till systems 

Kochia populations in Saskatchewan and North Dakota are now resistant to group 14 herbicides, leaving fewer options for Prairie farmers

Based on preliminary data from a recent Prairie-wide kochia survey, AAFC’s Charles Geddes suspects Group 14-resistant kochia is now present in multiple fields in Saskatchewan and expects it could soon be confirmed in other regions as well.

Jason Waldenberger’s combine in action right after his Seed Terminator was installed in the field.

What the weed seed smasher survey says

Farmers share insights from working with weed seed control technology

A recent study conducted by Agriculture and Agri-Food Canada provides a glimpse into why some Canadian producers are using harvest weed seed control, the effectiveness of the technology and some of the challenges associated with it. The 49-question online survey was conducted between the spring and fall of 2023. A total of 10 producers from […] Read more


herbicide resistant kochia

Kochia tumbling into Prairie pulse crops

Scouting — and testing for herbicide resistance — will be important this spring

Glacier FarmMedia — Concerns about the spread of kochia are growing for Saskatchewan’s pulse producers. Michael Brown, agronomy manager for Saskatchewan Pulse Growers, and Martin Carr, agronomy manager for WinField United, have seen the pesky tumbleweed spread throughout Saskatchewan, Alberta and the United States. The weed is resistant to some herbicides, among them Groups 4, […] Read more

AAFC’s Breanne Tidemann says kochia (seen here) appears to be spreading to areas of Alberta where it wasn’t seen previously.

Into the weeds: 2024 in preview

Prairie specialists consider which weeds are most likely to succeed as the season proceeds

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 head: weeds. Grainews […] Read more


Planting perennial forages in ditches is recommended to help keep kochia from getting a toehold.

Weed alerts on the southern front

A North Dakota weed expert cautions Prairie farmers about kochia, waterhemp and Palmer amaranth and their evolving herbicide tolerances

Of all the things shared by Prairie farmers on both sides of the Canada-U.S. border, an abiding love of their land, fretting over the weather and a no-nonsense, ‘get ‘er done’ attitude are among those that come to mind. Unfortunately, this also includes weed problems. Weeds know no borders, of course, so when weed trouble […] Read more

Kochia in a canola field.  Photo: File

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

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.


The importance of pre-seed herbicide application

The importance of pre-seed herbicide application

Q & A with an expert

Q: Should I skip the pre-seed herbicide application? A: As the long winter on the Prairies comes to an end, growers are starting to prepare for the 2023 growing season. With weather delays, many growers may be eager to get seeding and skip the pre-seed herbicide application. However, utilizing a pre-seed burnoff is a great […] Read more

With the increasing incidence of herbicide resistance, producers must adjust their strategies to manage kochia and other resistant weeds.

Your provincial weed outlook for 2023

Make sure these weeds are on your radar this year

For as long as agriculture has existed in Western Canada, farmers have been waging a battle to control yield-robbing weeds in their fields. It will be a similar story in 2023. The difference this time around is that battle could be shaped largely by the location where it is being fought. While Manitoba received significant […] Read more