Herbicides
I have had an evolution of views on herbicide resistance as it pertains to spraying. I’ve always believed that if you want to combat resistance with application technology, you need to spray less. After all, herbicide resistance is a direct consequence of relying too much on herbicide sprays.
Resistance is an evolutionary process by which weeds evolve to become resistant to whatever tools we are using to control them. It’s my contention that resistance cannot truly be eliminated. We can’t stop resistance but we can manage it. We can extend the life of these weed control tools as…
Canola growers gain a new tool to help control cleavers as the CODEX Alimentarius Commission (CAC) formally adopts a Maximum Residue Limit (MRL) for the active ingredient quinclorac in canola. Growers can now use quinclorac products in their canola to control cleavers. 
If you have weeds in your field after harvest, think about a fall burndown,” says James Ferrier, Nufarm’s technical services manager for Eastern Canada. A fall burndown can be an effective tool to manage many tough perennial and winter annual weed problems and provide a cleaner seedbed for your next…
Update: On Sept. 3, 2018, the Brazil federal court overturns its ban on glyphosate citing that the decision should factor in the implications of a glyphosate ban on Brazil's economy. (Reuters)
Presented by Franck Dayan, professor, department of bioagricultural sciences and pest management, Colorado State University, at the Herbicide Resistance Summit, Saskatoon, Feb 27-28, 2018.Group 14 herbicides are part of a group of chemistries that require light to be effective as an herbicide. In Canada, one of these compounds is called…
Weed resistance to herbicides is not a new issue. Canada has reported resistance issues in weeds to at least six different herbicide groups. As an increasing number of weeds no longer respond to herbicide, it is important to know more about the issue and how to detect it. 
The big story in 2017 was that canola surpassed wheat as the number one crop, and the most common rotation in Western Canada is canola-wheat, which certainly has implications for resistance management.
The first resistant population identified in Europe was a pigweed resistant to atrazine in Austria in 1973. Later on through the 1980s and 1990s, many weed species developed resistant to PSII inhibitors (Group 5), mostly to atrazine. More recently, there has been a dramatic increase in resistance to ACCase (Group…
Gowan Canada's Edge herbicide has been granted a minor use label extension for industrial hemp.
With the introduction of Monsanto’s glyphosate- and dicamba-resistant soybean into the Canadian market in 2017, producers may be wondering if there is any benefit to tank-mixing the two herbicides for weed control.
Weed control in corn and soybeans will only get more complicated and costly.That was a key message by long-time Iowa State University weed scientist Mike Owen in his 2018 weed management update presentation at the Integrated Crop Management Conference in November. He noted the management practices used by many farmers…
Gowan Canada has announced that the Avadex MicroActiv label has been expanded to include peas, in addition to existing crops barley, canary seed, canola, durum, flax and mustard.“As Group 1 and Group 2 resistant wild oats continue to plague more and more fields in the prairies according to the latest ag Canada studies, it…
Harvest quality of milling oats is very important, and growers sometimes utilize harvest aids such as pre-harvest glyphosate. A properly timed application can help growers control perennial weeds and improve crop harvestability, while meeting maximum residue limit (MRL) requirements. However, some buyers have placed restrictions on the use of pre-harvest…
The Herbicide Resistance Summit is a bi-annual conference brought to you by Top Crop Manager (TCM) and a group of generous sponsors that aims to facilitate a more unified understanding of herbicide resistance and promote awareness that all industry members have a role to play in managing the growing threat…
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