Weyerhaeuser has announced it is carrying out an aerial spraying program over the Wabigoon Forest.
The forestry company says roads through and within the spray areas of the forest will be temporarily closed to the public for the duration of the program.
A herbicide, known as Vision, is designed to control and reduce unwanted vegetation in the forest.
Spraying is carried out in the early morning and the early evening.
For more information, contact Weyerhaeuser or the MNR.