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    • Rangeland Ecology & Management, Volume 61 (2008)
    • Rangeland Ecology & Management, Volume 61, Number 5 (September 2008)
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    Combined Impacts of Native Grass Competition and Introduced Weevil Herbivory on Canada Thistle (Cirsium arvense)

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    Author
    Ferrero-Serrano, Angel
    Collier, Timothy R.
    Hild, Ann L.
    Mealor, Brian A.
    Smith, Thomas
    Issue Date
    2008-09-01
    Keywords
    biological control
    Ceutorhynchus litura
    Hesperostipa comata
    integrated pest management (IPM)
    Sporobolus airoides
    synergism
    weevil
    
    Metadata
    Show full item record
    Citation
    Ferrero-Serrano, Á., Collier, T. R., Hild, A. L., Mealor, B. A., & Smith, T. (2008). Combined impacts of native grass competition and introduced weevil herbivory on Canada thistle (Cirsium arvense). Rangeland Ecology & Management, 61(5), 529-534.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642980
    DOI
    10.2111/07-142R.1
    Additional Links
    https://rangelands.org/
    Abstract
    Invading exotics typically face new competitors and an absence of specialized herbivores in their new ranges. Biological control attempts to reunite invasive weeds with coevolved herbivores and restoration can reduce the return of invaders by maximizing competition from native species. The integration of both approaches is seldom examined in detail, although the two should complement each other. We investigated the potential to suppress an important invasive plant, Canada thistle (Cirsium arvense [L.] Scop.), by integrating biological control and competition from two native grasses frequently used in rangeland restoration. We evaluated the impacts of Ceutorhynchus litura F. (Coleoptera: Curculionidae), a weevil used for Canada thistle biological control, alone and in combination with either needle and thread grass (Hesperostipa comata [Trin. Rupr.] Barkworth) or alkali sacaton (Sporobolus airoides [Torr.] Torr.) in greenhouse competitive plantings. Weevil herbivory reduced root, but not shoot, biomass of Canada thistle. Competition from H. comata did not reduce biomass of thistles, but combinations of the weevil and H. comata greatly reduced thistle root biomass. S. airoides suppressed Canada thistle root biomass independent of weevils. Weevils had a positive indirect effect on the cool-season grass H. comata, presumably by reducing the competitive ability of thistles, but had no effect on biomass of the warm-season grass, S. airoides. Benefits of weevil presence as an augmentation of grass competition appear to depend on appropriate timing, and weevils provided the most benefit to the cool- season competitor. Our results suggest that restoration efforts can be complemented with insect biocontrol agents, although the timing of impact will depend on the particular weed species, grass competitors, and biocontrol insect agents involved. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/07-142R.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 61, Number 5 (September 2008)

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