PPO-resistant Palmer amaranth has been at least two years in the making

in Delta Farm Press

by Larry Steckel, Tennessee Extension Weed Specialist

It is becoming clear we aren’t at the beginning of things with respect to detecting PPO/glyphosate-resistant Palmer amaranth in the Mid-South. It became established two to three years ago.

From greenhouse screens for PPO-resistant Palmer amaranth in Arkansas and Tennessee, we continue to find new fields. Other neighboring states are finding it as well. Folks at the University of Kentucky have confirmed PPO-resistant Palmer amaranth in at least one county in western Kentucky. Continue reading