Quite often, growers discover herbicide resistant weeds on their farm after an effective herbicide fails to take out a targeted weed.
After some testing and reviewing past herbicide application records, growers might realize that the resistance problem is the result of repeated use of a particular herbicide or a history of not following best management practices that can help fend off herbicide resistant weeds and keep them out of your fields.
In this episode of Resistance Management School, Colorado State University’s Franck Dayan discusses how growers can assess the risk of herbicide resistant weeds taking root on their farm. Dayan joined RealAgriculture’s Bernard Tobin at the Ontario Certified Crop Advisor Association annual meeting earlier this year.
Dayan has six questions farmers need to ask to complete their risk assessment. These questions include:
- Has the same herbicide or herbicides with the same mode of action been used for several years?
- Has the uncontrolled weed been successfully controlled by the same herbicide in previous years?
- Are there live weeds beside dead weeds of the same species following a herbicide application?
- Has a decline in control been noticed in recent years?
- Are there resistant weeds in local fields, roadsides, farms, etc.?
- Are other species in the same location being adequately controlled by your herbicide application?
In the video, Dayan offers tips on how growers can complete an assessment, what to look for in their findings, and discusses best management practices that can help growers win the fight against herbicide resistant weeds.
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