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dc.contributor.authorKirby, D. R.
dc.contributor.authorLym, R. G.
dc.contributor.authorSterling, J. J.
dc.contributor.authorSieg, C. H.
dc.date.accessioned2020-09-18T04:03:26Z
dc.date.available2020-09-18T04:03:26Z
dc.date.issued2003-09-01
dc.identifier.citationKirby, D. R., Lym, R. G., Sterling, J. J., & Sieg, C. H. (2003). Observation: leafy spurge control in western prairie fringed orchid habitat. Journal of Range Management, 56(5), 466-473.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4003838
dc.identifier.doi10.2458/azu_jrm_v56i5_kirby
dc.identifier.urihttp://hdl.handle.net/10150/643466
dc.description.abstractThe western prairie fringed orchid (Platanthera praeclara Sheviak and Bowles) is a threatened species of the tallgrass prairie. Invasion by leafy spurge (Euphorbia esula L.) is a serious threat to western prairie fringed orchid habitat. The objectives of this study were to develop a herbicide treatment to control leafy spurge while sustaining western prairie fringed orchid populations and to evaluate the soil seedbank composition of leafy spurge-infested sites to guide long-term management strategies. Quinclorac (3,7-dichloro-8-quinolinecarboxylic acid), imazapic {(+/-)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2=yl]-5-methyl-3-pyridinecarboxylic acid}, and glyphosate [N-(phosphonomethyl)glycine] plus 2,4-D (2,4-dichlorophenoxy acetic acid) were applied in the fall for 2 consecutive years, and changes in leafy spurge cover, density, yield, and herbaceous yield were assessed. In a separate study, quinclorac, imazapic, and glyphosate plus 2,4-D were each fall-applied to 12 western prairie fringed orchids and assessed for reoccurrence and density of orchids 1-year after treatment. Quinclorac and imazapic, but not glyphosate plus 2,4-D, reduced leafy spurge cover, density, and yield without causing deleterious effects to associated native herbaceous cover and yields. Western prairie fringed orchid reoccurrence and density were unaffected by any herbicide 1 year after treatment. Soil cores were removed in spring and fall following the first year herbicide treatment, washed and placed in trays. Seedlings were allowed to germinate for 16 weeks in the greenhouse. Over 50 plant species were identified in the soil seedbank, of which approximately 60% were early seral species indicative of disturbance. Given the dominance of leafy spurge in the seed bank, a long-term management program to control this noxious species is warranted. Although these results are promising, longer-term studies need be conducted to ensure that repeated herbicide treatments do not harm the western prairie fringed orchid.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectthreatened species
dc.subjectimazapic
dc.subjectquinclorac
dc.subjectdisturbed habitats
dc.subjectPlatanthera praeclara
dc.subjectburied seeds
dc.subjectpesticide application
dc.subjectendemic species
dc.subjectglyphosate
dc.subjectEuphorbia esula
dc.subjecthabitats
dc.subjectweed control
dc.subjectforbs
dc.subjectprairies
dc.subjectinvasive species
dc.subjectintroduced plants
dc.subjectgrasses
dc.subjectNorth Dakota
dc.subjectinvasive species
dc.subjectherbicides
dc.subjectrange improvement
dc.subjectsoil seed bank
dc.titleObservation: Leafy spurge control in western prairie fringed orchid habitat
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.collectioninformationThe Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume56
dc.source.issue5
dc.source.beginpage466-473
refterms.dateFOA2020-09-18T04:03:26Z


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