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Conventional and Organic Options for the Control of Woolly Distaff Thistle (Carthamus lanatus)

Published online by Cambridge University Press:  20 March 2017

Joseph M. DiTomaso ,
Guy B. Kyser ,
David J. Lewis  and
John A. Roncoroni
Joseph M. DiTomaso*
Affiliation:
Cooperative Extension Weed Specialist and Professor, and Specialist, Department of Plant Sciences, University of California, Davis, CA 95616
Guy B. Kyser
Affiliation:
Cooperative Extension Weed Specialist and Professor, and Specialist, Department of Plant Sciences, University of California, Davis, CA 95616
David J. Lewis
Affiliation:
Farm Advisor and Farm Advisor, University of California Cooperative Extension, Novato, CA 94947
John A. Roncoroni
Affiliation:
Farm Advisor and Farm Advisor, University of California Cooperative Extension, Novato, CA 94947
*
*Corresponding author’s E-mail: jmditomaso@ucdavis.edu
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Abstract

Woolly distaff thistle is a long-lived winter annual that threatens the ranching and dairy industries within the North Coast counties of California, particularly the organic producers. No peer-reviewed publications have documented effective control options or integrated management approaches for this species. We conducted two experiments, each replicated, in Marin County, California. The first compared several conventional herbicides at two timings and rates, while the second compared a conventional herbicide treatment with organic and integrated organic control methods, including an organic herbicide (mixture of capric and caprylic acids). Results of the conventional herbicide treatments showed most spring applications (March or April) of aminopyralid, aminocyclopyrachlor, clopyralid, and combinations of aminopyralid + triclopyr, or aminocyclopyrachlor + chlorsulfuron had greater than 99% control of woolly distaff thistle with fewer than 1.5 seedlings per 27-m2 plot by the end of the growing season. Higher rates were generally necessary to achieve the same level of control with winter (January) applications. In the organic herbicide treatments, the most consistent treatment was a combination of mowing followed by 9% (v/v) or the organic herbicide. This treatment was slightly less effective compared with aminopyralid but did have better than 95% control of woolly distaff thistle. The results of this study provide control options for both conventional and organic ranching practices where woolly distaff thistle is a problem.

Keywords

Aminopyralidaminocyclopyrachlorcapric acidcaprylic acidchlorsulfuronclopyralidtriclopyrwoolly distaff thistle, Carthamus lanatus LChemical weed controlgrasslandherbicideinvasiveinvasive plant controlorganic weed controlrangeland
Type
Research and Education
Information
Invasive Plant Science and Management , Volume 10 , Issue 1 , March 2017 , pp. 72 - 79
Copyright
© Weed Science Society of America, 2017 

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Footnotes

Associate Editor for this paper: Steven S. Seefeldt, University of Alaska, Fairbanks

References

Literature Cited

Burns, EE, Prischmann-Voldseth, A, Gramig, GG (2013) Integrated management of Canada thistle (Cirsium arvense) with insect biological control and plant competition under variable soil nutrients. Invasive Plant Sci Manage 6:512–520 CrossRefGoogle Scholar
Burrill, LC (1994) Distaff Thistle (Carthamus lanatus). A Weeds Pacific Northwest Extension Publication. PNW 420. Reprinted May 1994Google Scholar
D’Amico, K (2013) Carthamus lanatus, Woolly Distaff Thistle. Invasives Database. http://texasinvasives.org/plant_database/detail.php?symbol=CALA20. Accessed: May 16, 2016Google Scholar
Dellow, JJ (1996) Herbicide techniques for thistle management. Plant Protect Q 11(Suppl 2):276–277 Google Scholar
DiTomaso, JM, Healy, EA (2007) Weeds of California and Other Western States. Oakland, CA: University of California Agriculture and Natural Resources Publication 3488. 1808 pGoogle Scholar
DiTomaso, JM, Kyser, GB, Oneto, SR, Wilson, RG, Orloff, SB, Anderson, LW, Wright, SD, Roncoroni, JA, Miller, TL, Prather, TS, Ransom, C, Beck, KG, Duncan, C, Wilson, KA, Mann, JJ (2013) Weed Control in Natural Areas in the Western United States. Davis, CA: University of California Weed Research and Information Center. 544 pGoogle Scholar
DiTomaso, JM, Kyser, GB, Pitcairn, MJ (2006) Yellow Starthistle Management Guide. Berkeley, CA: California Invasive Plant Council Publication 2006-03. 65 p. www.cal-ipc.org Google Scholar
Enloe, SF, Lym, RG, Wilson, R, Westra, P, Nissen, S, Beck, G, Moechnig, M, Peterson, V, Masters, RA, Halstvedt, M (2007) Canada thistle (Cirsium arvense) control with aminopyralid in range, pasture, and noncrop areas. Weed Technol 21:890–894 Google Scholar
Fromm, GM (1990) Chemical control of saffron thistle (Carthamus lanatus L.) in pasture in the South Australian Mallee. Plant Protect Q 5:14–17 Google Scholar
Grace, BS, Sheppard, AW, Walley, RDB, Sindel, BM (2002) Seedbanks and seedling emergence of saffron thistle (Carthamus lanatus) in eastern Australian pastures. Aust J Agric Res 53:1327–1334 CrossRefGoogle Scholar
Norland, JE, Fasching, S, Dixon, C, Askerooth, K, Kelsey, K, Wang, G (2013) Reduced establishment of Canada thistle (Cirsium arvense) using functionally similar native forbs. Ecol Restor 31:143–146 Google Scholar
Oregon Department of Agriculture (2010) Plant Pest Risk Assessment for Distaff Thistle, Carthamus lanatus. http://library.state.or.us/repository/2010/201010251137511/index.pdf. Accessed: May 16, 2016Google Scholar
Parsons, WT, Cuthbertson, EG (2001) Noxious Weeds of Australia. 2nd edn. Collingwood, Victoria, Australia: CSIRO. 712 pGoogle Scholar
Patton, AJ, Ruhl, GE, Creswell, TC, Wan, P, Scott, DE, Becovitz, JD, Weisenberger, DV (2013) Potential damage to sensitive landscape plants from wood chips of aminocyclopyrachlor damaged trees. Weed Technol 27:803–809 Google Scholar
Quinlivan, BJ, Peirce, JR (1968) The long-term field germination of saffron thistle (Carthamus lanatus L.) and the life span of dormant seeds in the Geraldton Region of Western Australia. J Aust Inst Agric Sci 34:231–232 Google Scholar
Shorten, C (2007) Saffron Thistle. Agriculture Victoria. http://agriculture.vic.gov.au/agriculture/pests-diseases-and-weeds/weeds/a-z-of-weeds/saffron-thistle. Accessed: May 16, 2016Google Scholar
Spooner, A (2000) Carthamus lanatus L.: Saffron Thistle. FloraBase: The Western Australian Flora. https://florabase.dpaw.wa.gov.au/browse/profile/7911. Accessed: May 16, 2016Google Scholar
Research Group, LLC (2014) Economic Impact From Selected Noxious Weeds in Oregon. Prepared for Oregon Department of Agriculture Noxious Weed Control Program. https://www.oregon.gov/ODA/shared/Documents/Publications/Weeds/ORNoxiousWeedEconomicImpact.pdf. Accessed May 16, 2016Google Scholar