Managing Glyphosate Failures
Date
2011-07-15
Authors
Hartzler, Bob
Owen, Micheal D.K.
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Iowa State University Extension and Outreach
Abstract
In the past week we have received numerous calls from farmers, agricultural chemical dealers and industry representatives regarding waterhemp and horseweed/marestail surviving glyphosate applications made in late June and early July. Although there are numerous reasons why a herbicide application might fail at controlling weeds, we are certain that a significant percentage of these failures are due to the presence of glyphosate-resistant biotypes in the field.
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