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    Observations: Potential long-term environmental impact of tebuthiuron and its metabolites in Utah juniper trees

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    Author
    Johnsen, T. N.
    Issue Date
    1992-03-01
    Keywords
    herbicide residues
    Juniperus osteosperma
    metabolites
    persistence
    tebuthiuron
    brush control
    duration
    application rates
    
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    Show full item record
    Citation
    Johnsen, T. N. (1992). Observations: Potential long-term environmental impact of tebuthiuron and its metabolites in Utah juniper trees. Journal of Range Management, 45(2), 167-170.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644756
    DOI
    10.2307/4002777
    Additional Links
    https://rangelands.org/
    Abstract
    The concentrations, distribution, and longevity of tebuthiuron [N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N'-dimethylurea] and its metabolites in Utah junipers [Juniperus osteosperma (Torr.) Little] killed by tebuthiuron are not known, causing concern about potential residues and their release into the environment from decaying plants or burning wood. Utah juniper trees killed by tebuthiuron at 3 north-central Arizona locations were assayed for tebuthiuron and its metabolites by gas chromatography with flame photometric detection. Foliage, twigs, stems, and litter from recently killed trees averaged 13.3 +/- 0.4, 0.4 +/- 0.1, 0.4 +/- 0.1, and 4.0 +/- 6.6 mg/kg of tebuthiuron plus its metabolites, respectively. Dead stems averaged 0.5 +/- 0.4 mg/kg in sapwood, 0.1 +/- 0.1 mg/kg in heartwood, and 0.4 +/- 0.7 mg/kg in bark, 3 to 9 years after application. Root bark averaged 1.1 +/- 1.9 mg/kg, and root wood averaged 0.5 +/- 1.4 mg/kg. Although long lived, these small tebuthiuron residues should have little potential environmental harm if treated Utah juniper wood is used as firewood or fence posts.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002777
    Scopus Count
    Collections
    Journal of Range Management, Volume 45, Number 2 (March 1992)

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