Pesticide Treatment at High Park

Urban Forestry will be carrying out management of invasive trees, shrubs and vines in High Park over the winter months.

Various sections of the natural areas in High Park are managed for invasive trees, shrubs and vines.  Treatment in these areas will take place intermittently during the period of December to March. A triclopyr-based pesticide (Garlon RTU) is being used to control these invasive species. Pesticide signs will be posted 24 hours prior to any treatment taking place and will delineate the border of the site being managed at that time.

The invasive species being treated includes Norway Maple and Common Buckthorn, these species impact native plants and habitat by:

• crowding out and shading native vegetation and young trees

• encouraging soil erosion due to lack of ground cover

Application is done by licensed city staff, and additional information signage will be posted along with the standard warning signage.  Warning signage is posted 24 hours before treatment and is removed 48 hours following treatment, according to Ministry of Environment guidelines.

Please see the Fact Sheet below for more information.

FACTSHEET Norway Maple Common Buckthorn_