GFM Network News


It’s recommended that the Hypro 3D nozzle is in a forward-backward configuration to ensure better coverage.

A nozzle approach to spray coverage

Design of this 3D sprayer nozzle began in the U.K. and now has a global reach

Reading Time: 6 minutes Although they’re essential on today’s commercial farms, sprayers typically rank third in importance behind seeding equipment and combines, and maybe that’s fair considering the importance of how the crop starts and how it finishes. Still, there’s no denying that the jobs you do with your sprayer are taking on new importance. Just think herbicide-resistant weeds, […] Read more

Farmers are looking for a solution to glyphosate-resistant Canada fleabane, which is a growing concern.

Can less be more when tackling herbicide resistance?

A coming formulation of glufosinate seeks to cut rates yet maintain efficacy

Reading Time: 4 minutes In the past five years, growers across Canada have been hearing more and more about a new weed control mantra. It’s called “doing only what’s necessary.” Weeds continue to challenge and frustrate in the field, of course, and there are always new issues like resistance in species such as Canada fleabane in the East or […] Read more


Waterhemp is now resistant to seven modes of action and is also showing signs of metabolic-based resistance.

New threat to weed management

Metabolic-based resistance is setting off alarms south of the border. There won’t be any easy answers

Reading Time: 6 minutes Here in the 2020s, herbicide resistance seems just part of the reality of managing weeds. It’s certainly not a new topic. We faced resistance to atrazine in the 1970s, then Group 2 ALS inhibitors in the 1990s and a more recent, widespread resistance to glyphosate. But of course the resistance threat keeps getting more complicated: […] Read more

These thriving kochia plants are probably resistant to more than one herbicide mode of action.

Using a multi-prong strategy against herbicide resistant weeds

There are more pre-seed control options available to suppress herbicide-resistance, but use cultural management as well

Reading Time: 4 minutes More than half of western Canadian fields under annual crop production contain at least one herbicide-resistant biotype, according to surveys from 2014 to 2017. In Alberta, roughly 60 per cent of fields surveyed have resistant weeds; in Saskatchewan that figure is 57 per cent and in Manitoba it’s 68 per cent. “The surveys have been […] Read more


Canada fleabane rosette during October.

Pest Patrol: Management practices that controlled glyphosate-resistant weeds in 2020

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 3 minutes Several Ontario agronomists recently shared their most successful strategies for managing glyphosate-resistant weeds. Four general strategies were identified: 1. Inclusion of winter wheat in the crop rotation By early spring, winter wheat’s dense ground cover does not provide a good environment for annual weeds, like waterhemp, to germinate. There are also many herbicides that are […] Read more

(File photo by Dave Bedard)

German cabinet approves legislation to ban glyphosate from 2024

Law would still need parliamentary approval

Reading Time: < 1 minute Berlin | Reuters — Farmers in Germany will have to gradually reduce their use of glyphosate and stop using it completely from 2024 in order to preserve clean habitats for insects, under draft legislation passed by the country’s cabinet on Wednesday. “The exit from glyphosate is coming. Conservationists have been working toward this for a […] Read more


Figure 1: Annual bluegrass.

Pest Patrol: Bluegrass becomes an emerging problem in field crops

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 4 minutes In Ontario, turf-like grassy weeds are being found in more cultivated fields. In herbicide-tolerant corn and soybean, control with glyphosate has been inconsistent. In cereal and forage crops, fast growth of these grasses in the spring makes them too big to be controlled with herbicides. Let’s review what is being found in fields and how […] Read more

Soybean planting showing leaf injury symptoms caused by a “bleaching” herbicide.

Pest Patrol: Crop injury from herbicide residues more common in 2020

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 4 minutes In 2020, a few farmers observed leaf injury in their soybean crops. The injury caused parts of the leaf to turn white, then yellow (see photo at top). This injury is typically caused by “bleaching” herbicides. It was odd, though, because the bleaching herbicide had been applied to the previous year’s corn crop, and it […] Read more


Figure 1. Dog strangling vine along a roadside in York Region where it is creeping into the fenceline and bordering corn field.

Pest Patrol: Dog strangling vine control with herbicides

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 2 minutes An invasive perennial weed from the milkweed family, dog strangling vine is extremely difficult to control once it gets established (Figure 1 at top). Progress has been made on biological control of this weed in Ontario through the release of Hypena opulenta, a leaf-feeding caterpillar. However, integrated strategies that include both biological and chemical methods […] Read more

A sight no one wants to see in soybeans: cupping of the leaves caused by dicamba.

U.S. legal system helps weeds win

Luckily, Canadian producers are still outside the reach of the Ninth Circuit Court ruling on dicamba-based herbicides

Reading Time: 5 minutes In farming circles, the term “less-forgiving” has become more than a cliché. It’s now a mirror on reality. Farmers are already dealing with an incredible list of challenges and complexities, including everything from new seed technologies, concerns about land costs, equipment decisions, commodity markets, trade issues… you name it. Now growers in the U.S. must […] Read more