Italian ryegrass (Lolium perenne ssp. multiflorum) has been confirmed to harbor resistance to ALS, clethodim, glyphosate and paraquat herbicides in the southern United States (Heap 2023). There is no good control option for this herbicide-resistant ryegrass if management is postponed until the spring. Fall residual herbicide applications are necessary to control herbicide-resistant ryegrass populations effectively in the Midsouth states.
With wheat planting just around the corner, growers will soon be focused on managing crop inputs. Depending on where wheat is produced, troublesome, herbicide-resistant grasses and key broadleaf weed species continue to be a challenge for U.S. wheat growers.
Weeds and grasses can diminish yield potential. One key decision that coincides with wheat planting is how to effectively manage yield-robbing weeds to avoid potential loss and dockage at the grain elevator.
Farmers looking for high-yielding soybeans and strong disease management might find the two-pass fungicide approach the best way to meet their goals.