date:May 10, 2012
gence herbicides and nitrogen applications have been completed, Hartzler says in a university report alongside fellow ISU agronomist John Sawyer. Of particular concern are no-till fields where planting was completed prior to killing emerged weeds.
This calls for quick action in those fields where you think preemerge herbicides may have not done their job, for a couple of reasons. First, Hartzler says corn typically can stave off early weed damage until about the V3 growth stage...if it's plante