Horseweed (marestail) continues to be the #1 weed escape in Michigan soybean fields. Resistance to ALS-inhibitors (Group 2) and/or glyphosate (Group 9) leaves few options for post-emergence horseweed control. In addition to multiple herbicide resistance, prolonged emergence, changes in tillage practices and capabilities of long distance seed dispersal have also contributed to the increased prevalence of horseweed in many of Michigan’s soybean fields.
During the past two seasons, with funding by MSPC and Project GREEEN, we have conducted research that has shown fall-seeded cereal cover crops provide early-season horseweed suppression compared with no cover. Additionally, delaying cover...
Unique Keywords:
#weed control