What to do if glyphosate resistance is suspected.
- Steve Walker
- July 2009
- A glyphosate-resistant weed.
Consider having your weeds tested for glyphosate resistance if:
- paddocks are at risk of glyphosate resistance
- there are survivors of a glyphosate application.
Testing is recommended if there is a moderate or high risk of glyphosate resistance.
Testing is also recommended if the other common causes of herbicide failure are not likely, such as:
- the glyphosate was applied in conditions and at a rate that should kill the target weed
- the suspect plants avoided herbicide contact or emerge after the spraying
- the pattern of surviving plants suggests a spray miss or other application problem
You can assess the risk for glyphosate resistance by completing the glyphosate resistance risk questionnaire.
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