OSU Research Forests will be spraying herbicide on all roads, roadside ditches, and cutbanks on the McDonald, Dunn and Elizabeth Starker Cameron Demonstration Forests. These forests will be CLOSED as early as Tuesday, June 25, 2024 with closures lasting up to 3 to 4 days.

The timing of the closure is subject to change, depending on contractor availability and weather conditions.  As work locations will vary throughout the closure, we intend to open segments of the forest to public use as we complete work.  We will send out Forest Updates at the start of closures, and when closures are lifted.

The date of application and chemical names will be posted on the sign above on the day of application. Roadside spraying typically occurs every one to two years to help control the spread of invasive weeds and to protect the integrity of the roadbed and ditches.  

If you have any questions about roadside spraying on the OSU Research Forests, please email finn.leary@oregonstate.edu.  For questions regarding the herbicides used, please contact National Pesticide Information Center.