Spring herbicide spray starting as early as Wednesday, April 3

The OSU Research Forests plan to spray McDonald-Dunn harvest units as early as Wednesday, April 3, 2024. The exact dates are dependent on weather conditions and contractor availability.

We will spray all treatment units on the McDonald and Dunn Forests using backpack sprayers.  Spray targets vegetation only (not road or trail surfaces).

During application, staff will be at roads and official trails leading into spray areas to keep people away. 

Signs will be posted at entry points to each treatment area and include: date of application, herbicide used, and public re-entry information. Signs will remain in place for one week.

Herbicides are used in the Research Forest to control the growth of non-native plant species and competing vegetation in recently harvested areas. All herbicide applications are conducted in compliance with State and Federal regulations and under a licensed pesticide applicator's supervision.   

Click here for a map of the spray locations throughout the McDonald-Dunn Forests