mustard is an invasive plant species that can quickly invade and
dominate the forest floor, limiting or eliminating the growth of native
species such as trilliums and violets. In North America, Garlic Mustard
has a lack of natural predators. It also has a fast growth rate and can
disperse 15,000 seeds per plant, which remain viable in the soil for up
to five years. Garlic Mustard Factsheet.pdf
Garlic mustard has begun to colonize the NVCA
watershed. Heavy infestations were observed along some trail sections in
the Hockley Valley, the Nottawasaga Bluffs Conservation Area
and Pretty River Valley Provincial Park. Lighter infestations were observed at Petun Conservation Area
Invasive Species on Private Property
NVCA does not offer a service to remove invasive species on private
property. If you are looking for tips on dealing with garllc mustard on your property, see the links above, or visit
Ontario's Invading Species Awareness Program.
Garlic Mustard and the Bruce Trail
extent of garlic mustard infestation along sections of the Bruce Trail
in the NVCA watershed was documented during the summer of 2009 by NVCA
staff (including an Ontario Federation of Anglers and Hunters Invasive
Species Program student), Fred Nix (NVCA board member) and several
volunteers. The Bruce Trail was selected for monitoring for the
portions of the trail run through three NVCA-owned lands
some sections of the trail run through provincially and regionally significant Areas of Natural and Scientific Interest (ANSIs)
there is evidence that garlic mustard seeds can be inadvertently spread by hikers, leading to further infestation
The monitoring methodology consisted of hiking along the trail and
recording various parameters when garlic mustard was encountered,
including the shape of the garlic mustard patch (linear or polygon), the
geographical location of the start and end of the patch and the
estimated number of plants in the patch.
Many garlic mustard
infestations were observed near parking areas and trail access points.
This suggests that garlic mustard seeds are inadvertently being carried
by hikers' footwear along the trail system and being introduced to
previously unaffected areas.
The final report provides
recommendations for garlic mustard control which will hopefully be
implemented by agencies and volunteer groups to keep this invasive
species at bay. The NVCA plans to continue working with the Bruce Trail
Conservancy and the OFAH to monitor the Bruce Trail.
Garlic Mustard Monitoring Along the Bruce Trail in the Nottawasaga Valley