While quackgrass is probably less of a problem on most Wisconsin farms today than in the past, it is still a weed of concern. Excellent older herbicides (atrazine and glyphosate) and newer ones (ACCase inhibitors for use in soybeans and alfalfa and sulfonylureas for use in corn) have certainly contributed to reducing quackgrass abundance. While atrazine is no longer an effective quackgrass herbicide due to rate limitations, we have an array of options for quackgrass control in corn. And in recent years, corn breeders have used traditional and transgenic techniques to develop hybrids that tolerate new herbicides such as glufosinate and imidazilinones and the older one, glyphosate, which previously were not used postemergence in corn. An in-depth comparison of these new maize genetics technologies for quackgrass control is needed.