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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.
Species Profile- Canada Thistle (Cirsium arvense), National Invasive Species Information Center, United States National Agricultural Library. Lists general information and resources for Canada thistle. Profile: Canada Thistle (Cirsium arvense) Photos, Drawings, Text. (Wild Plants of Winnipeg from Nature Manitoba)
Aceria anthocoptes is considered to be a good potential biological control agent for Cirsium arvense, the Canada thistle. It damages both the epidermal cells and deeper mesophyll layers, on both the upper and lower surfaces of this invasive weed. The result is visible deformation and folding of the leaf blade, with a curling of the leaf edges.
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This is a list of herbicides. These are chemical compounds which have been registered as herbicides . The names on the list are the ISO common name for the active ingredient which is formulated into the branded product sold to end-users. [ 1 ]
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]