Field guide for managing russian knapweed in the southwest

Russian knapweed (synonyms: turestan thistle, creeping knapweed, mountain bluet, russian cornflower, ... carefully for 2 or 3 years and spot spray returning.
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Field Guide for ManagingRussian Knapweedin the SouthwestForestService February 2015SouthwesternRegion TP-R3-16-13United States Department of AgriculturePrinted on recycled paperThe U.S. Department ofAgriculture (USDA) prohibits discriminationin all its programs and activities on the basis of race, color, nationalorigin, age, disability, and where applicable, sex, marital status,familial status, parental status, religion, sexual orientation, geneticinformation, political beliefs, reprisal, or because all or part of anindividual’s income is derived from any public assistance program.(Not all prohibited bases apply to all programs.) Persons withdisabilities who require alternative means for communication ofprogram information (Braille, large print, audiotape, etc.) shouldcontact USDA’s TARGET Center at (202) 720-2600 (voice andTTY). To file a complaint of discrimination, write to USDA, Director,Office of Civil Rights, 1400 Independence Avenue, SW, Washington,DC 20250-9410 or call (800) 79...