The Weed Resistance Workshops, sponsored by the Ohio AgriBusiness Association and the Ohio Soybean Association, will be held Feb. 28 and 29, and March 1. They will feature presentations by OSU Extension weed specialists Mark Loux and Tony Dobbels. Representatives from Monsanto also will be there to take part in a panel discussion with other experts to answer farmers' questions.
Grain farmers across the state continue to experience glyphosate-resistant marestail as a key weed problem, Loux said. While it was traditionally found in the southwestern portions of Ohio, resistant populations are now found throughout the state.
"Marestail is the most abundant herbicide-resistant weed we have in Ohio," he says. "Given the very warm weather we've had thus far this winter, it may grow more vigorously into the spring, making it harder to kill."
There also are growing concerns among Ohio growers about glyphosate-resistant Palmer amaranth, which is significantly impacting growers in Southern states.
"Farmers are seeing pictures of entire fields being mowed down in the South because of Palmer amaranth," he says. "While we don't have anything as extreme as that happening here, we want to make sure we don't have similar issues like that in the future."
Palmer amaranth, while not yet found in Ohio, has continued to move north. According to the University of Illinois, at least one population was recently confirmed in southern Illinois.
The Weed Resistance Workshops are free and run from 9 a.m. to 12:30 p.m., followed by a lunch. Dates and locations are as follows:
* Northeast Ohio - Feb. 28 at the Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster.
* Central and Southern Ohio - Feb. 29 at the Fawcett Center, 2400 Olentangy River Road, Columbus.
* Western and Northwest Ohio - March 1 at the Centre, 601 North Main St., Bluffton.
Participants can sign up for the workshops at OABA's website at http://www.oaba.net