Helianthus Annuus Common Sunflower

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TREATMENT OPTIONS from the book Weed Control in Natural Areas in the Western United States This does not constitute a formal recommendation. When using herbicides always read the label, and when in doubt consult your farm advisor or county agent. This is an excerpt from the book Weed Control in Natural Areas in the Western United States and is available wholesale through the UC Weed Research & Information Center (wric.ucdavis.edu) or retail through the Western Society of Weed Science (wsweedscience.org) or the California Invasive Species Council (cal-ipc.org). Helianthus annuus Common sunflower Family: Asteraceae NON-CHEMICAL CONTROL Grazing F will graze new shoots Prescribed burning P fire creates conditions favorable to sunflower establishment Mowing and cutting P Tillage E Grubbing, digging or hand pulling E CHEMICAL CONTROL The following specific use information is based on published papers and reports by researchers and land managers. Other trade names may be available, and other compounds also are labeled for this weed. Directions for use may vary between brands; see label before use. 2,4-D E Imazapic E Aminocyclopyrachlor + E Imazapyr E chlorsulfuron Metsulfuron G* Aminopyralid E Paraquat P Seedlings only Chlorsulfuron E Picloram E Clopyralid E Rimsulfuron E Dicamba E Sulfometuron E Glyphosate G Sulfosulfuron E Hexazinone G Triclopyr E E = Excellent control, generally better than 95% * = Likely based on results of observations of G = Good control, 80-95% related species FLW = flowering F = Fair control, 50-80% NIA = No information available P = Poor control, below 50% Fa = Fall Control includes effects within the season of treatment. Sp = Spring Control is followed by best timing, if known, when efficacy is E or G. Su = Summer 1 of 2 2013 A WEED REPORT from the book Weed Control in Natural Areas in the Western United States Hardstem bulrush, tule RECOMMENDED CITATION: DiTomaso, J.M., G.B. Kyser et al. 2013. Weed Control in Natural Areas in the Western United States. Weed Research and Information Center, University of California. 544 pp. 2 of 2 2013 .

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