Zero tolerance for weeds in corn is imporant
A pre-emergence application of Corvus has worked well for Minchow in growing corn, and he has not had to make a post-emergence application in every field. He only hopes using multiple modes of action and multiple applications of products whenever a weed is discovered will keep him from having a problem with waterhemp and Palmer amaranth.
“Corvus offers excellent control of most weeds when applied as a one pass program, but for situations where waterhemp and Palmer amaranth are present,” Bloomberg explained, “a two pass program will be needed due to the extended germination window of these two weed species.”
He added that as part of this two pass program, Bayer CropScience recommends the herbicides used contain several differing but effective sites of action for control of these species.
“By using differing site of action herbicides in these programs, this should help slow the development of herbicide resistance,” Bloomberg said. For example, if Corvus is used as the pre-emergence option, a grower can come back with a postemergence program containing Laudis or Capreno. In the interest of helping manage and prevent weed resistance from developing, these postemergence options should also contain another effective site of action herbicide such as an auxin or atrazine.
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