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    • Journal of Range Management, Volume 49 (1996)
    • Journal of Range Management, Volume 49, Number 4 (July 1996)
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    Leafy spurge and grass response to picloram and intensive grazing

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    Author
    Lacey, J. R.
    Sheley, R. L.
    Issue Date
    1996-07-01
    Keywords
    Euphorbia esula
    Poa pratensis
    rain
    selective grazing
    species differences
    sheep
    cattle
    plant density
    picloram
    biomass
    Montana
    grazing
    feeding preferences
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    Citation
    Lacey, J. R., & Sheley, R. L. (1996). Leafy spurge and grass response to picloram and intensive grazing. Journal of Range Management, 49(4), 311-314.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644279
    DOI
    10.2307/4002588
    Additional Links
    https://rangelands.org/
    Abstract
    More information about the effects of combining intensive livestock grazing of noxious weeds and associated desirable plants with other control measures is needed to develop effective rangeland weed management strategies. We studied the response of leafy spurge (Euphorbia esula L.) and Kentucky bluegrass (Poa pratensis L.) to intensive short-duration grazing by either sheep or cattle, in combination with picloram (4-amino-3,5,6-trichloropicolinic acid) for 5 years. In the first year, 2 pastures (16 and 24-ha) were split into 3 blocks and picloram was applied to one-half of each block at a rate of 0.9 kg ha-1. Exclosures were established to include both treated and untreated portions in each block. The smaller and larger pastures were grazed by sheep and cattle, respectively. There were 1 or 2 grazing periods per year, varying from 1- to 2-days in length. Leafy spurge stem densities were counted annually, and grass cover and plant biomass were also examined. Data from each pasture (cattle or sheep) were analyzed separately using analyses of variance. Leafy spurge was selectively grazed by sheep, and stem densities were reduced by sheep grazing (P < 0.01). Cattle did not utilize leafy spurge and stem densities were not affected. Picloram reduced leafy spurge stem densities throughout the study in both the sheep (P < 0.001) and cattle (P < 0.001) pastures. Picloram also reduced leafy spurge biomass in the sheep pasture (P < 0.05), which allowed an increase in Kentucky bluegrass biomass. Grazing X picloram interactions affecting either leafy spurge stem densities or leafy spurge biomass were not detected. An integrated leafy spurge management system may require a longer time frame, additional control measures, and (or) more intensive grazing management.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002588
    Scopus Count
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    Journal of Range Management, Volume 49, Number 4 (July 1996)

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