Fall Weed Management Tips

Many farmers have witnessed the value in applying herbicides in the fall to perennial weeds, especially perennial sow-thistle and dandelion (Figure 1). Often they will see a reduction in their population the next year as well as a delay in their shoot emergence. This allows the planted crop to have a competitive advantage over those […]

Read More…

Annual rye-grass and clover sensitivity to soil applied corn herbicides

by: Dr. Darren Robinson (University of Guelph, Ridgetown Campus) and Mike Cowbrough (OMAFRA) There is interest in inter-seeding annual ryegrass and clover into corn (Figure 1). Research studies have been done in the United States and Canada to determine the tolerance of cover crops to various soil applied corn herbicides.  This article provides an overview […]

Read More…

Weed Inspectors Conference 2017

The annual weed inspectors conference is scheduled for Thursday April 12th, 2018 at the Victoria East Golf Course, Guelph, Ontario. The cost is $75 (HST included) and includes morning snacks, lunch and resource material. The objective of this conference is to provide an overview of the Weed Control Act, administrative and enforcement duties conducted by weed […]

Read More…

Steel in the field

I recently was asked if I knew of any good resources for farmers wishing to reduced herbicide use or transition to organic production. My favourite is called “Steel in the field – a farmer’s guide to weed management tools” Edited by Greg Bowman and published by the Sustainable Agriculture Network. If you want a print […]

Read More…

Herbicide Injury Scenarios in Soybean – 2015 Ridgetown Diagnostic Days

Below are 10 herbicide injury scenarios applied to 4 different soybean varieties, specifically, Liberty Link (glufosinate tolerant), Enlist (glufosinate, glyphosate and 2,4-D tolerant), Xtend (glyphosate and dicamba tolerant) and Roundup Ready (glyphosate tolerant). Since it is possible that both Enlist and Xtend varieties may be available for the 2016 growing season, one of the main […]

Read More…

Re-Spraying Weeds in Non-GMO soybeans

flumetsulam applied post to soys

Dealing with weed escapes in non-GMO or “identity preserved” soybeans can be challenging because many of the herbicides available don’t control a large spectrum of weeds nor will the handle larger weeds the way that glyphosate does in a glyphosate tolerant (RR) soybean crop. I have summarized the performance of several post-emergence herbicides for non-GMO […]

Read More…

Herbicide Injury Scenarios in Corn – Ridgetown Diagnostic Day (2014)

The following 10 herbicide injury scenarios in corn were presented at the South West Crop Diagnostic Days on July 9th and 10th, 2014. Each scenario contain 2 corn hyrbids. One that had tolerance to glyphosate (e.g. Roundup) and glufosinate (e.g. Liberty). The other was an Enlist hybrid, that had tolerance to glyphosate (e.g. Roundup), glufosinate (e.g. Liberty), phenoxy herbicides […]

Read More…

Permit herbicide – Guidelines for use in field corn

The recent registration of Permit (active ingredient: halosulfuron) in Ontario provides a nice tool for the management of yellow nutsedge in corn. Permit will also provide residual control of certain broadleaf weeds. For those two reasons, many growers will consider tank-mixing glyphosate and Permit for use in glyphosate tolerant corn. Here are 5 key points to consider when […]

Read More…