Key Issues Perspective: One weed at harvest is one too many
Mike Thompson, Beck’s Hybrids, seed advisor with the Atlanta, Ind., based company, explained how glyphosateresistant marestail and giant ragweed is a “big issue in Indiana.”
He said farmers with high-seed-producing weeds are being directed toward the use of LibertyLink soybeans because Liberty herbicide, if applied correctly, will take care of those escaped marestail, waterhemp, giant ragweed and even Palmer amaranth weeds.
In the “old days before Roundup Ready,” growers were told to look at fields to spray 21 days after planting when weeds were quite small and an ALS or minimally damaging herbicide might be used. With the adoption of Roundup Ready, Thompson said, farmers began expecting completely clean fi elds and they saw a little increase in yield because of less weed competition.
He said, today where glyphosate-resistant weed-escapes occur, “we see the yield advantage with the Liberty program fi elds over the Roundup program fields.” Thompson said, “We are trying to educate growers about glyphosate-resistant weeds and that they need to do everything possible to prolong the life of glyphosate, and that means using multiple modes of action including a LibertyLink system.”
It's necessary that no weeds exist in a field today.
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