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Date: 2013-02-11 12:04:17Botany Biology Cirsium arvense Clopyralid Urophora cardui Trichosirocalus horridus Thistle Biological pest control Trichosirocalus Invasive plant species Curculionidae Flora | Canada Thistle Research Update ND Agriculture Commissioner’s Weed Forum Mandan, ND January 8th, 2013 Dr. Greta Gramig, NDSU Dr. Deirdre Prischmann-Voldseth, NDSUAdd to Reading ListSource URL: www.nd.govDownload Document from Source WebsiteFile Size: 2,99 MBShare Document on Facebook |