Mark VanGessel, Extension Weed Specialist; mjv@udel.edu and Frank D’Amico Some common ragweed in the region (DE, MD, and NJ) have evolved resistance to glyphosate, PPO-herbicides (Group 14), and ALS-herbicides (Group 2). Some populations are resistant only to glyphosate, others are… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu, Claudio Rubione, University of Delaware and Michael Flessner, Virginia Tech Herbicides and Site of Action Weeds are the major pest that farmers need to control on an annual basis. Weeds reduce yields through plant… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu Since many small grain fields did not get an herbicide treatment last fall, they may need to be sprayed as soon as the fields dry out to control weeds before weeds get too large… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu As troublesome herbicide resistant weeds continue to develop and spread across the United States, effective weed management strategies require the use of multiple effective techniques rather than relying on a singular method of weed… Continue Reading
Mark VanGessel, Extension Weed Specialist; mjv@udel.edu and Kurt M. Vollmer, Postdoctoral Researcher, University of Delaware; kvollmer@udel.edu Control of Palmer amaranth in soybeans requires the right product, at the right rate, at the right time. Residual herbicides are important to slow… Continue Reading
