GFM Network News


Keeping the corn plant weed and stress free early allows the plant to form a larger cob, up to its genetic potential.

Focus on the ear leaf in corn production

Keeping the corn plant weed and stress free early allows the plant to form a larger cob, up to its genetic potential

Reading Time: 6 minutes It seems every growing season brings something new for growers to manage. Sometimes it’s a new disease or its anticipated arrival. Other years, it’s learning to cope with the impact of weather conditions, or a sudden weed flare-up. It’s a testament to modern agricultural science that the more we learn, the more questions we ask. […] Read more

Weed control with Authority Supreme (Groups 14 and 15), notice that overall weed control is good with the exception of Canada fleabane.

Pest Patrol: Weed control in IP soybeans

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 2 minutes For more than a decade now, the University of Guelph and OMAFRA have been comparing the level of weed control, crop safety and grain yield associated with different herbicide programs in food grade, non-GMO soybeans, otherwise known as IP (identity preserved) soybeans. Table 1 (see below) summarizes the weed control and crop injury achieved with […] Read more


To be effective, a good stewardship strategy should provide options for this year and a glimpse ahead to next year.

The stewardship challenge in farming

With field management getting more complicated, it’s time for a new approach

Reading Time: 7 minutes As the 2020 planting season approaches, growers, advisors, agronomists and industry stakeholders are all hoping for something better than the past two years. Does every year have to have a challenge like 2019’s difficult harvest, or 2018’s run-in with gibberella ear rot (GER) in corn? If it weren’t for the headaches imposed by weather, a […] Read more

Figure 1: Unsprayed control.

Controlling scentless chamomile with herbicides

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 3 minutes Several herbicide treatments were evaluated in a 2019 on-farm research trial to determine best management options for scentless chamomile, a weed with a reputation for being difficult to control. Although 10 treatments provided greater than 80 per cent visual control of emerged plants, new seedlings continued to emerge several weeks after application, resulting in a […] Read more


Developed in conjunction with Bosch, the Xarvio Smart Sprayer determines when and what chemical to spray, which requires multiple nozzles or multiple lines to a single nozzle.

Smart sprayer knows which herbicide to apply, and when

BASF’s Xarvio advances application technology

Reading Time: 3 minutes It’s clear that public sentiment about perceived food safety and the environment is beginning to have a significant impact on consumer choices. An easy case in point is the marketing of meatless burgers at fast food chains as a way to save the planet from climate change. In crop production, meanwhile, the use of herbicides […] Read more

AAFC tests have been on a pull-type Harrington Seed Destructor, but a newer version is integrated with the combine.

Weed control from the back of the combine

Prairie manufacturers are offering chaff collectors, and AAFC continues tests with the Harrington Seed Destructor

Reading Time: 4 minutes Mechanical weed control hasn’t been widely adopted in Western Canada but it soon will be, says Trevor Thiessen of Redekop Manufacturing in Saskatoon. “We don’t have the same stress on the resistance issue that other parts of the world are seeing. In Canada, we’re five years behind Australia in terms of thinking about mechanical weed […] Read more


Figure 1: Purple deadnettle in a wheat field — October 2018 at a yield-reducing population density of around 500 plants per square metre.

PHOTOS: Pest Patrol: Purple deadnettle and henbit control in winter wheat

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 3 minutes Q: I’m seeing more henbit and/or purple deadnettle in my winter wheat crop. Should it be controlled, and how? A: Henbit and purple deadnettle are often discussed interchangeably because they look similar, are from the same genus (Lamium) and have similar emergence patterns (mainly in the fall, but henbit will also emerge in spring). Both […] Read more

Although it has yet to be confirmed in Ontario, Palmer amaranth is capable of rapid spread and should be treated as glyphosate resistant.

Recognize the threat of these invasive weeds

How big a problem can waterhemp and Palmer amaranth really be? Let’s not find out

Reading Time: 7 minutes Has everyone been crying wolf about waterhemp? After all, haven’t we been hearing warnings in southern Ontario about the weed for the past 15 years, and who has lost a bushel? Well, it was actually 17 years ago — 2002 — when the species was first confirmed in Lambton County, and the good news is […] Read more


Farmers’ friends: bugs, birds and worms can eat weed seeds before they get a chance to germinate.

Weed control with small critters

Insects, birds and worms are a free – and resistance-free – method of controlling weeds before they get a chance to germinate

Reading Time: 4 minutes The dominance of zero- or minimum-tillage practices on the Prairies means lots of weed seeds are left on the soil after harvest, but it turns out that there’s help available to stop them from germinating next spring, and you don’t have to buy it at your local chemical dealer. “Lowering the deposits into the weed […] Read more

Drought stress symptoms in corn leaves where no soil-applied herbicides had been applied and weed control was done with a late post-emergence application.

Pest Patrol: Don’t be cheap with weed control

#PestPatrol with Mike Cowbrough, OMAFRA

Reading Time: 3 minutes “Weed control is an investment into the current and future crops on every field.” The above quote was parting advice from Norfolk and Oxford County farmer Ann Vermeersch at the 2019 FarmSmart Conference in Guelph. In front of 80 farmers and agronomists, I moderated a session with Vermeersch and Steph Kowalski, a certified crop advisor […] Read more