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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 1 (January 1991)
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    Economic evaluation of spotted knapweed [Centaurea maculosa] control using picloram

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    Author
    Griffith, D.
    Lacey, J. R.
    Issue Date
    1991-01-01
    Keywords
    feasibility studies
    mathematical models
    cost-benefit analysis
    weed control
    chemical control
    pastures
    picloram
    Centaurea maculosa
    range management
    Montana
    forage
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    Citation
    Griffith, D., & Lacey, J. R. (1991). Economic evaluation of spotted knapweed [Centaurea maculosa] control using picloram. Journal of Range Management, 44(1), 43-47.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644850
    DOI
    10.2307/4002636
    Additional Links
    https://rangelands.org/
    Abstract
    Spotted knapweed is the most serious range weed problem in western Montana. Although picloram is often used to control knapweed, the economic feasibility of the practice has not been evaluated. We developed a model to economically evaluate spotted knapweed control on rangeland. Model functions describing the dynamics of the plant community preceding and following treatment were derived from field observations in western Montana. Economic returns per management unit were calculated for 3 scenarios: (1) no treatment, (2) containment, and (3) eradication of spotted knapweed. After tax costs and benefits of treatments were analyzed for a 20-year period and discounted to the present. An economic loss in current dollars of 2.38/ha was incurred under the no treatment strategy when 25% of the management unit was initiaily infested with spotted knapweed and the weed was spreading to new acres and replacing desirable forage. After-tax present value of added AUMs in the eradication strategy was greater than the after-tax present value of added costs, 3.41/ha and l.99/ha, respectively. As site productivity, value of an AUM, and rate of knapweed spread to new acres increased, economic returns increased relative to treatment costs. In contrast, herbicide treatment became least cost-effective as knapweed utilization by livestock increased. Thus, economic feasibility of spotted knapweed control varied with economic and biologic conditions.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002636
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 1 (January 1991)

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