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Research Article

Tolerance of native wildflower species to postemergence herbicides

Jessica L Wiese, Elai N Keren and Fabian D Menalled
Native Plants Journal, March 2011, 12 (1) 31-36; DOI: https://doi.org/10.3368/npj.12.1.31
Jessica L Wiese
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Elai N Keren
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Fabian D Menalled
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Abstract

Postemergence herbicides may facilitate weed control in native wildflower seed production fields. In a greenhouse study, we assessed the impact of 4 postemergence herbicides (linuron, halosulfuron, imazapic, and pendimethalin) on 4 wildflower species: white prairie clover (Dalea candida Michx. ex Willd. [Fabaceae]), blanketflower (Gaillardia aristata Pursh [Asteraceae]), silverleaf phacelia (Phacelia hastata Douglas ex Lehm. [Hydrophyllaceae], and prairie coneflower (Ratibida columnifera (Nutt.) Woot. & Standl. [Asteraceae]). Pendimethalin applied at 1.9 kg ai/ha (1.69 lb ai/ac) caused the least seedling injury across all species and therefore may help weed management in wildflower production systems. Although linuron applied at 0.56 kg ai/ha (0.5 lb ai/ac) appeared to be a promising alternative for weed control, oven-dry biomass for G. aristata was reduced by this herbicide. Imazapic and halosulfuron applied at 0.14 kg ai/ha (0.125 lb ai/ac) and 0.048 kg ai/ha (0.042 lb ai/ac), respectively, caused severe damage on wildflower seedlings.

  • wildflower seed production
  • herbicide injury
  • Dalea
  • Gaillardia
  • Phacelia
  • Ratibida
  • linuron
  • halosulfuron
  • imazapic
  • pendimethalin
NOMENCLATURE:
  • USDA NRCS (2009)

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Native Plants Journal: 12 (1)
Native Plants Journal
Vol. 12, Issue 1
20 Mar 2011
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Tolerance of native wildflower species to postemergence herbicides
Jessica L Wiese, Elai N Keren, Fabian D Menalled
Native Plants Journal Mar 2011, 12 (1) 31-36; DOI: 10.3368/npj.12.1.31

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Tolerance of native wildflower species to postemergence herbicides
Jessica L Wiese, Elai N Keren, Fabian D Menalled
Native Plants Journal Mar 2011, 12 (1) 31-36; DOI: 10.3368/npj.12.1.31
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Keywords

  • wildflower seed production
  • herbicide injury
  • Dalea
  • Gaillardia
  • Phacelia
  • Ratibida
  • linuron
  • halosulfuron
  • imazapic
  • pendimethalin
  • USDA NRCS (2009)
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