EPA releases Interim Review Decision on oxadiazon

By Casey Reynolds, Ph.D., Turfgrass Producers International (TPI)

On April 28 the U.S. Environmental Protection Agency (EPA) released its Interim Review Decision on several pesticides as part of its periodic review of pesticide registrations. One active ingredient that is of key interest to sod producers is oxadiazon, a pre-emergence herbicide labeled for use on many weed species of annual grasses, primarily crabgrass and goosegrass.

TPI has been working with EPA on this registration review since at least August of 2021 when the Proposed Interim Registration Review Decision was posted to the EPA’s public document in the U.S. Federal Register. As a result, TPI and nine individual sod producers from the states of Georgia, North Carolina, South Carolina, Tennessee, and Texas submitted comments for EPA’s consideration on oxadiazon’s importance in sod farms and the potential impacts of this registration review decision on those who use it.

Most of the proposed changes to the oxadiazon label revolve around rate reductions, limitations on liquid applications, post-application irrigation, and others. For the full article, including a summary of the EPA’s recommendations from the Interim Registration Review, visit https://www.turfgrasssod.org/epa-releases-interim-review-decision-on-oxadiazon/