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Orellia ruficauda feeds on Canada thistle and has been reported to be the most effective biological control agent for that plant. [41] Its larvae parasitize the seed heads, feeding solely upon fertile seed heads. [42] The weevil Larinus planus also feeds on the thistle and has been used as a control agent in Canada. [43]
Clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) is a selective herbicide used for control of broadleaf weeds, especially thistles and clovers.Clopyralid is in the picolinic acid family of herbicides, which also includes aminopyralid, picloram, triclopyr, and several less common herbicides.
An FWS Wilderness Fellow tracking thistle beetles released in Canada as biological control agents . Thistle plants are known for their very fast-growing ability, which can quickly overpower local agriculture. They have few predators and are hard to kill through human activity due to their fast seed production. [4] It is estimated that Canada ...
This is a list of invasive species in North America.A species is regarded as invasive if it has been introduced by human action to a location, area, or region where it did not previously occur naturally (i.e., is not a native species), becomes capable of establishing a breeding population in the new location without further intervention by humans, and becomes a pest in the new location ...
In Canada, it has been used as an agent of biological pest control against the noxious weed Canada thistle (Cirsium arvense). It was subsequently evaluated in the United States as a biocontrol agent and distributed across a range of the Great Plains in the western United States. [8] [9]
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Aceria anthocoptes, also known as the russet mite, [1] rust mite, [2] thistle mite or the Canada thistle mite, [3] is a species of mite that belongs to the family Eriophyidae.It was first described by Alfred Nalepa in 1892.