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Date: 2011-09-14 11:29:21Biology Cirsium arvense Cirsium Thistle Urophora cardui Clopyralid Larinus planus Herbicide Weed Invasive plant species Flora Botany | Microsoft Word - CANADA THISTLE-r.docAdd to Reading ListSource URL: www.nd.govDownload Document from Source WebsiteFile Size: 362,18 KBShare Document on Facebook |