In this Crop Minute, Bob Hartzler, ISU Extension weed scientist, says now that corn has been sprayed with post-emerge herbicide, it is time to turn attention to soybeans. Water hemp and giant ragweed are two species that soybean producers need to keep an eye on as they spread rapidly and have shown resistance to glyphosate.
Iowa State University
Integrated Crop Management News, "Crop Minute Week of June 7" (2010). Integrated Crop Management News. 412.
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