Weed Science at the University of Kentucky
Weed Science News
March 3, 2016
The presence of Palmer amaranth (Amaranthus palmeri) and waterhemp (Amaranthus tuberculatus [syn rudis]) was limited except for a few localized areas of west Kentucky prior to the year 2000. Between 2005 and 2010 isolated problems with control of these Amaranthus species with glyphosate in grain crops began to develop and were reported in counties in west Kentucky adjacent to major rivers including the Mississippi, Ohio, Cumberland, and Green Rivers.
February 4, 2016
LAWRENCE, Kan. — Today the Weed Science Society of American (WSSA) announced that new and updated educational materials for both weed scientists and the general public are now available for free download from the Society’s website.
Free fact sheet on types of weeds
November 12, 2015Glyphosate-resistant Palmer amaranth (Amaranthus palmeri) and waterhemp (Amaranthus tuberculatus) continue to spread across Kentucky. Initially these pigweed species were thought to be present primarily in the west end of the state (Purchase area and along the lower Ohio River region), but have now been found in over 50 counties throughout Kentucky. These sightings would indicate that Palmer amaranth and waterhemp continues to be a growing threat to grain crop production within the state.