Below is a summary of all weed samples sent into the University of Guelph by producers and agronomists that suspected resistance to a particular herbicide during the 2012 season. Also included are herbicide options with different modes of action that are effective on each species. The latest summary of glyphosate resistant Canada fleabane and Giant ragweed populations is also listed. Note that these are cumulative maps of the last 3-4 years, whereas the other species are just for this past year.
- Alternative Solutions – Corn
- Conventional: dicamba, Battalion, Callisto + Aatrex, Converge XT, Distinct, Integrity, Marksman, Pardner, Prowl H2O
- Roundup Ready Corn: glyphosate
- Liberty-Link Corn: Liberty
- Alternative Solutions – Soybean
- Non-GMO soybean: Basagran Forte, Command, Lorox, Valtera
- Roundup Ready: glyphosate
- Liberty-Link: Liberty
- Labelled Solutions in Corn:
- Conventional: dicamba, Battalion, Callisto + Aatrex, Converge XT, Distinct, Integrity, Marksman,
- Roundup Ready Corn: glyphosate
- Liberty-Link Corn: Liberty
- Alternative Solutions – Soybean
- Labelled Solutions in Corn:
- Conventional: dicamba, Battalion, Callisto + Aatrex, Converge XT, Distinct, Integrity, Marksman, Pardner, Prowl H2O
- Roundup Ready Corn: glyphosate
- Liberty-Link Corn: Liberty
- Alternative Solutions – Soybean
- Alternative Solutions – Corn
- Conventional: Accent, Option 2.25 OD, Ultim
- Roundup Ready Corn: glyphosate
- Liberty-Link Corn: Liberty
- Conventional: Accent, Option 2.25 OD, Ultim
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- Alternative Solutions – Soybean
- Non-GMO soybean: Pursuit (suppression), Sencor
- Roundup Ready: glyphosate
- Liberty-Link: Liberty
- Alternative Solutions – Soybean
- Alternative Solutions – Corn
- Conventional: Battalion, Converge XT, Dual II Magnum, Frontier Max, Integrity, Primextra II Magnum, Prowl H2O,
- Roundup Ready Corn: glyphosate
- Liberty-Link Corn: Liberty
- Conventional: Battalion, Converge XT, Dual II Magnum, Frontier Max, Integrity, Primextra II Magnum, Prowl H2O,
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- Alternative Solutions – Soybean
- Non-GMO soybean:Dual II Magnum, Frontier Max, Prowl H2O
- Roundup Ready: glyphosate
- Liberty-Link: Liberty
- Alternative Solutions – Soybean
Source: Dr. Peter Sikkema and Holly Byker, University of Guelph, Ridgetown Campus
- Alternative Management solutions in Corn:
- Alternative Management solutions in Soybean:
Source: Dr. Peter Sikkema and Joanna Follings, University of Guelph, Ridgetown Campus
If you suspect you have a herbicide resistant weed population, you can get it tested. More information can be found here.
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