North Dakota Fishing and Hunting Forum banner

Canada Thistle Gall Fly / Bio Control

5K views 1 reply 2 participants last post by  Plainsman 
#1 ·
Some years back Barnes County, ND, had a release of Canada thistle stem gall fly, Urophora cardui, in the west central part of the county. Nothing showed up a first but now it appears the fly has established a population. The larva forms a gall on the thistle stem inhibiting seed production.

See: http://www.whitman.wsu.edu/weeds/canadathistle.html

While it's not the answer to control of these noxious weeds, every little bit helps. So when hunting, if you see a patch of thistles with the galls, pick a pocketfull and drop them off in another area with thistles. Farmers would appreciate it.

 
See less See more
1
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top