Whether you are planning to plant a Roundup Ready, Liberty Link or a conventional corn variety this year, it is important to plan ahead and think about the type of weed management program you will utilize.

Over the past five years, I’ve had the opportunity to evaluate a lot of different herbicides and herbicide programs for use in corn and recently I’ve compiled much of this data. Understand that these are not comparisons of specific herbicide treatments and trade names, but rather are comparisons of different herbicidal program approaches.

I was able to make a fair comparison of three different program approaches that have been evaluated in 37 trials in Missouri over the past five years. What I found was that in 64% of the trials, highest corn yields were obtained with a two-pass program consisting of a preemergence herbicide followed by a postemergence herbicide.

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By Kevin Bradley, University of Missouri