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Region 2 - Treasure Valley >> Ada County >> Canada Thistle Panorama >> Biocontrol Results Video

Biocontrol Results Video                                                          

Roger Batt comments, "Well here we have Canada Thistle, one of Idaho's 36 noxious weeds and definitely one of the noxious weeds we want to get rid of in Idaho." Roger asks Bryan Dallolio if there is a biological control for this weed. Bryan notes that there are a few, but they have not been very successful. Establishment and their inability to stay selective for just Canada Thistle has meant that there are no longer any biological control agent releases. This is one of the few times that a biological control had a less than acceptable result. Also, at one time there was a release that damaged some native thistles and to Bryan's knowledge no other releases have been made on Canada Thistle.

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