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    Author(s): Jian J. Duan; Kristopher J. Abell; Leah S. Bauer; Juli Gould; Roy Van Driesche
    Date: 2014
    Source: Agricultural and Forest Entomology. 16(4): 406-416.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (753.63 KB)

    Description

    The emerald ash borer Agrilus planipennis Fairmaire is a serious invasive forest pest of ash (Fraxinus) trees in North America. Life tables were constructed for both experimentally established cohorts and wild populations of A. planipennis on healthy host trees from 2008 to 2011 in six forests in central Michigan. Life table analysis showed that the net population growth rates (R0) for the experimental cohorts (16.0±2.9) and associated wild A. planipennis (19.4±1.9) were the highest for the first study period (2008-2009) at three Ingham Co. sites but decreased to 4.7±0.9 and 4.6±0.4, respectively, for the second (2009-2010) study period at the same sites. By contrast, R0 values of both experimental cohorts (5.7±2.2) and associated wild A. planipennis populations (11.3±2.5) were intermediate in the third (2010-2011) study period at different sites in the Gratiot and Shiawassee Cos. The sudden decrease in R0 of both experimental and wild A. planipennis cohorts in the Ingham Co. sites corresponded with increases in parasitism by hymenopteran parasitoids Atanycolus spp. (native) and Tetrastichus planipennisi Yang (introduced), as well as an increase in woodpecker predation, indicating the role of these natural enemies in regulation of the pest's population dynamics.

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    Citation

    Duan, Jian J.; Abell, Kristopher J.; Bauer, Leah S.; Gould, Juli; Van Driesche, Roy. 2014. Natural enemies implicated in the regulation of an invasive pest: a life table analysis of the population dynamics of the emerald ash borer. Agricultural and Forest Entomology. 16(4): 406-416.

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    Keywords

    Biological control, invasive, life table, net population growth rate, wood borers

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