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Invasive Phragmites Threatens Ontario: $113M Annual Cost
25 Sep
Summary
- Invasive phragmites cost Ontario $113.4 million annually.
- This aggressive plant outcompetes native species and harms wildlife.
- New funding supports monitoring and management projects across Ontario.

Invasive phragmites, an aggressive grass originating from Europe and Asia, poses a substantial threat to Ontario's ecosystems and economy, with annual costs estimated at $113.4 million. This invasive plant, capable of reaching 15 feet in height, aggressively outcompetes native species for resources and excretes toxins into the soil, harming surrounding plant life and wildlife. Its rapid spread also affects municipal infrastructure like roads and drainage systems, while creating fire hazards and blocking access to shorelines.
The Ontario Phragmites Action program is addressing this challenge by funding various projects across the province through the Invasive Phragmites Control Fund, which is supported by the Ontario Ministry of Natural Resources. These initiatives are coordinated by the Invasive Species Centre and the Nature Conservancy of Canada, involving municipalities, conservation authorities, Indigenous communities, and non-profits.
One such project, led by the Mattagami Region Conservation Authority in partnership with the City of Timmins and Mattagami First Nation, focuses on early detection, monitoring, and management of phragmites in the Timmins region. This collaborative effort utilizes shoreline, roadside, and drone surveys, alongside DNA testing, to identify and map infestations. Community education and youth engagement are also key components to build local capacity.
Other regions and organizations receiving funding include Greater Sudbury, the Junction Creek Stewardship Committee, Manitoulin Streams Improvement Association, and Nipissing First Nation. These coordinated, long-term efforts are crucial for managing and preventing the introduction and spread of invasive phragmites throughout Ontario, safeguarding the province's natural assets and economic well-being.