Ottawa is turning to artificial intelligence to tackle one of the region's most hazardous invasive plants — wild parsnip — a weed whose sap can cause painful, long-lasting burns when skin is exposed to sunlight.
What Is Wild Parsnip?
Wild parsnip (Pastinaca sativa) might look like an ordinary roadside weed, but contact with its sap can trigger a severe phototoxic reaction. When the plant's juices get on skin and are exposed to UV light, they can cause blistering, burns, and discolouration that can last for months. The plant thrives in disturbed soil along roadsides, trail edges, and open fields — exactly the kind of terrain that's common across Ottawa's green spaces and rural boundaries.
The weed has been spreading steadily across Ontario, and Ottawa's mix of urban greenways and rural land makes it a persistent management challenge for city crews.
How the AI Tool Works
The City of Ottawa is now using an AI-powered detection tool to help identify wild parsnip more efficiently. City workers spoke with CBC Ottawa's Hallie Cotnam about the technology, explaining how it aids in locating the plant across the capital's vast land holdings.
While traditional detection relies on trained staff visually scanning areas on foot or by vehicle, AI tools can process imagery and flag likely parsnip locations faster and at greater scale. This kind of technology has been increasingly adopted by municipalities looking to manage invasive species more proactively — getting ahead of outbreaks before they spread into high-traffic parks and pathways.
Why It Matters for Ottawa Residents
For everyday Ottawans who hike, cycle, or let their kids play near roadsides and trails, wild parsnip is a genuine safety concern. The plant often goes unrecognized — its yellow flower clusters can resemble harmless wildflowers — and accidental contact is easy, especially in summer when the plant is in full bloom.
The city has long run awareness campaigns urging residents to identify and avoid wild parsnip, but early detection is the most effective way to prevent large infestations from taking hold near public spaces.
By using AI to map where the plant is growing, crews can prioritize removal efforts and post warnings in affected areas before residents stumble into them during a weekend trail run or family picnic.
What You Can Do
If you spot what you think is wild parsnip on city property, you can report it through the City of Ottawa's 311 service. When outdoors near roadsides and ditches in summer, wear long sleeves and avoid touching unfamiliar plants. If you do come into contact with wild parsnip sap, wash the area with soap and water immediately and keep it out of sunlight.
The city's investment in AI-assisted detection is a sign that Ottawa is taking invasive plant management seriously — and looking for smarter ways to keep public green spaces safe for everyone.
Source: CBC Ottawa / Hallie Cotnam
