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Spiny Rose Leaf Gall

Bug Bits Common Name: Spiny Rose Leaf Gall Scientific Name: Diplolepis polita Native to: Possibly throughout Canada and the United States Date Seen: May 2012 Location: South of Cluny, Alberta Notes: These galls were found on Wild Roses. A gall wasp induces a chemical reaction in rose stems or leaves. This creates a case, or gall, that protects the wasp’s larvae.