Dry weather complicating herbicide decisions

An Illinois-based agronomist says dry conditions are complicating some herbicide application decisions across the Midwest.

Karen Corrigan with McGillicuddy-Corrigan Agronomics tells Brownfield residual herbicides work best when followed by rain within 10 days.

“Most forecasts for the next 10 days don’t have any rain in them, so my advice is to spray the post-application if needed for those weeds that are up and then save the residual for more favorable weather.”

She says many herbicides are formulated to control weeds no taller than 6 inches, so fields that are nearing that height restriction do need a post emergent application, but farmers should also be mindful of the crop stage.

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