These weeds define “really bad” and include, Creeping yellow cress (Rorippa sylvestris L.); mugwort (Artemisia vulgaris L.); red stem filaree (Erodium cicutarium); field horsetail (Equisetum arvense); yellow nutsedge (Cyperus esculentus L.); and Liverwort (Marchantia polymorpha) to name a few. New research to find successful controls will be discussed along with the characteristics that make them “the worst!
Mathers Environmental Science Services, LLC
Hannah Mathers is currently an independent horticultural researcher in nursery and landscape. From 2000-2014 she was a Professor at Ohio State University, Columbus, Ohio. Hannah is the recipient of several awards including meritorious service, distinguished contributions, and promotion of diversity. She is a recognized national speaker and writer and is best known for her research in bio-rational, conventional, and alternative weed control in nursery crops and landscapes. She is also noted for her diagnostic expertise of herbicide damage including drift and woody plant cold stress physiology.