Giant Hogweed

McMurrich Monteith Township
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Public Notices

 Giant Hogweed Go Back

Giant hogweed (Heracleum mantegazzianum) is an invasive plant that has become established in parts of Ontario. It presents a public safety hazard.

The Ontario Ministry of Natural Resources (MNR), in partnership with the Ontario Federation of Anglers and Hunters, is tracking the occurrence and monitoring the spread of giant hogweed (along with other invasive species).

Potential Health Effects:

Anyone who plans to remove giant hogweed should be aware that the sap of this weed can burn your skin, causing blisters and scarring. If the sap gets into your eyes it has been reported to cause temporary or permanent blindness.

If you find giant hogweed:

 Report sightings of giant hogweed to the INVADING SPECIES HOTLINE at 1-800-563-7711 or online at They will confirm whether or not it is the giant hogweed.

 Report the occurrence of this invasive species to your municipality as well. Municipal staff need to be aware of issues, including giant hogweed, that may impact the health of people living in the community.

More Information:
The Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) website has information that will help you correctly identify giant hogweed including detailed directions on how to control it using both mechanical and chemical control methods.

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