The OSU Research Forests will be spraying all roads, roadside ditches, and cut-banks on the McDonald, Dunn, and Cameron Forests. These forests are planned to be closed to the public from June 21-23, 2021.  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 hope to open segments of the forest to public use as we complete work. 

We will post signs at each forest gate announcing the upcoming application. On the day of application, we will add the chemical name and its date of application. 

The herbicide application operation will consist of a pilot vehicle, a truck spraying chemical, and a chase vehicle.  Roadside spraying occurs once every two years to help control the spread of invasive weeds and to protect the integrity of the road bed and ditches.

If you have any questions about roadside spraying on the OSU Research Forests, please contact us. 

If you have any questions regarding specific chemicals, please contact the National Pesticide Information Center at 1-800-858-7378 or via email.