GFM Network News


As you begin harvesting your crops, take detailed notes about the weed populations you find. Each field will tell a story about your weed control strategies and how effective they are. Fall quackgrass is shown here.

Benefits of post-harvest weed control applications

Q & A with an expert

Q: Should I be thinking about resistance management at harvest? A: We don’t often think about resistance management after harvest, but both during and after harvest is a great time to start observations and applications. As you begin harvesting your crops, take detailed notes about the weed populations you find. Each field will tell a […] Read more

Up against some resistance? These tips below could help reduce the chances of your fields becoming a haven for hard-to-eliminate weeds.

Eight ways to boost your herbicide resistance prevention strategy

The latest information and improvements to management systems

It’s a dire situation that the number of herbicide groups various weeds are resistant to continues to grow across the Prairies; however, farmers should take heart as there are many actions they can take to protect their fields this year and for years to come. It’s about managing weeds to reduce reliance on, and enhance […] Read more


On the left is regrowth of glyphosate-resistant kochia following a harvest date in early August. On the right is regrowth of glyphosate-resistant kochia following the same harvest date but with a post-harvest application of glyphosate and saflufenail.

Seeding strategies benefit pre- and post-harvest weed control

The most effective treatments can involve decisions made at seeding

The early reports from a couple of ongoing field research projects are suggesting some of the most effective treatments for pre- and post-harvest weed control might actually involve decisions made at seeding, say weed specialists. In Saskatchewan, Clark Brenzil, provincial weed specialist with Saskatchewan Agriculture, is looking at how narrower row spacing (10 inches) as […] Read more



Nexus Robotics’ R2-Weed2 uses artificial intelligence to distinguish between weeds and crops. The robotic weeder removed or killed 90 per cent of the weeds during the growing season in field trials in Nova Scotia.

More robotic weeder field trials to take place in Quebec, commercial release 2021

The R2-Weed2 removed or killed 90 per cent of weeds during growing season

Weeds can take over farm fields and lead to significant crop losses. Without adequate control, crop yields could decline up to 50 per cent in corn and soybean fields across the United States and Canada, resulting in US$43 billion in economic losses, according to data from the Weed Science Society of America. Additionally, controlling weeds […] Read more

Wild oat is showing significant herbicide resistance, says Saskatchewan’s provincial weed control specialist.

What weed experts say you should have your eye on in 2020

A province-by-province look at what you need to know about weeds this growing season

Three provincial weed specialists offer their insights on the weeds farmers may find in their fields this growing season and what can be done about them. Manitoba Tammy Jones, a Manitoba Agriculture weed specialist, lists redroot pigweed, lamb’s quarters and green and yellow foxtail as the biggest weed threats this year. Winter annuals like stinkweed […] Read more


When weeds are spotted in fields, best management practices like rotating crops, applying herbicides and controlling weeds when they are small are recommended.

How weed seeds move into your fields

Q & A with an expert

Q: Where are all these weeds coming from? A: Despite our best management practices, we will never eliminate weeds from our fields. Weed seeds will continue to find their way onto our fields in not so mysterious ways. Excluding volunteer crops, the most significant ways new weeds move onto our fields is by wind, water, […] Read more

Pre-seed weed control is important this spring

Weed control will be a different challenge this year. With little fall weed control and good moisture, fields will have an abundance of overwintered annuals, such as cleavers, flixweed, narrow-leaved hawk’s beard and volunteer canola, alongside spring emergence of other annual and perennial weeds. These overwintered annuals are a particular challenge as they are often […] Read more


A waterhemp infestation can reduce soybean yields by 40 to 95 per cent.

War on weeds, take no prisoners

Hart Attacks: It will take money and commitment to just to hold enemy line

A recent issue of the Manitoba’s provincial farm newspaper, the Manitoba Co-operator, carried some depressing news. The province might be losing the war on herbicide resistant weeds; reports from the U.S. say despite some kind of trade deal with China, U.S. farmers figure they will need more than a $25 billion bailout in 2020 — […] Read more

Herbicide “layering” strategy delivers multiple punches

Effective for weed control and reduces risk of herbicide resistant weeds surviving

Corey Loessin has for several years been delivering the one/two and sometimes multiple punches through the pulse crop weed control program on his northwest Saskatchewan farm. Primarily growing red lentils and yellow peas near Radisson, northwest of Saskatoon, Loessin says his main objective is to use different products with varying modes of action to control […] Read more