The relatively early beginning to corn harvest provided a good environment for the emergence of volunteer corn, said University of Illinois associate professor of weed science Aaron Hager.
“Emerged volunteer corn at this time of year is normally not a problem because the plants will winterkill,” Hager said. “However, if a killing frost does not occur soon, these volunteer plants could be an impediment to farmers who would like to sow wheat this fall.”
To provide a better environment for small grain establishment, volunteer corn plants should be controlled before sowing. Preplant tillage is effective, but what about using a herbicide to control established plants?
Glyphosate is very effective for controlling existing stands of sensitive corn. There is no waiting interval between application and sowing small grains, but overall control may be improved if at least 24 hours elapse between application and replanting.
Glyphosate will not control glyphosate-resistant volunteer corn. Alternative herbicides such as Gramoxone SL can be used.… Continue readingRead More »