Canada Thistle Weed Project: The study of a weed biocontrol
Impact of Stem Mining Weevil (Hadropontus litura) population density on Canada Thistle Suppression
Canada thistle (Cirsium arvense) is an aggressive, colony-forming perennial weed which reproduces by both seeds and horizontal creeping root systems.
It is listed under the Alberta Weed Control Act as noxious. Canada thistle has a high tolerance to many environmental conditions and is very competitive with other types of vegetation. It is common in locations like riparian areas that do not allow for chemical or mechanical weed control.
There is hope, however. Enter: the stem-mining weevil.
The Stem-mining Weevil
The Canada thistle stem-mining weevil (Hadroplontus litura) is native to Austria, Britain, France, Germany, Switzerland, and southern Scandinavia; it is not native to Canada. The stem-mining weevil is an introduced species brought to Canada in 1965 as a biological pest ...
If you have questions about the Canada Thistle Weed Project, pleasae contact:
Environment Program
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780-826-7260
