Effective control of common burdock doesn’t happen overnight and is most successful when you can control new seedlings in the spring followed by controlling any larger first year plants in the fall so that they don’t overwinter, flower and disperse new seed the following year . Common burdock (Arctium minus) is a biennial that reproduces only […]
I was driving down a long country road and noticed that two large fields, where winter wheat was harvested almost eight weeks ago, had a beautiful thick canopy of oats. It wasn’t long until I came across a field that was left fallow, that it became clear why so many farmers had chosen to plant […]
Featuring over 120 species commonly found in and around agricultural fields, the Weed ID Guide for Ontario Crops is now available in the following formats. ePub format (124 MB file for Kindle, iBooks and other e-reader apps): click to download .pdf format (8 mb file): click to download print ready .pdf (141 mb file): click to […]
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 […]
This post will serve as a primary resource for the status of herbicide resistant weeds along with testing services and expertise provided to Ontario agriculture. […]
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 […]
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 […]
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 […]
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 […]
There is some confusion on the approach for managing glyphosate resistant Canada fleabane in soybeans. I provide two scenarios that have been often asked this past winter and their solutions based on the learnings of Dr. Peter Sikkema’s applied research program out of the University of Guelph (Ridgetown campus). Scenario # 1: No-till soybeans with […]
Here are some resources that will be helpful in the identification of crop injury caused by herbicides. Classes of herbicide injury according to their location on the plant (begins on page 280) Below is an archive of diagnostic day scenarios. 2015 Herbicide Injury Scenarios 2014 Herbicide Injury Scenarios 2013 Herbicide Injury Scenarios 2012 Herbicide Injury […]
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 […]
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 […]
Find below recurring questions I’ve been asked lately and my response. Q: Do you have a list of new soybean herbicides with details of what they are, what they control and when they should be applied? A: Find a summary that includes a weed control rating table here: New Soybean Herbicide Comparisons 2014_Final Q: How does […]
Pesticide spray drift is the aerial movement and unintentional deposit of pesticide outside the target area. Spray drift has many negative impacts, including: less product being deposited on the target, resulting in reduced efficacy financial loss associated with wasted pesticide and time the risk of damage to human health, susceptible plants (e.g. adjacent crops), non-target […]