Premium
Natural enemies implicated in the regulation of an invasive pest: a life table analysis of the population dynamics of the emerald ash borer
Author(s) -
Duan Jian J.,
Abell Kristopher J.,
Bauer Leah S.,
Gould Juli,
Van Driesche Roy
Publication year - 2014
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1111/afe.12070
Subject(s) - emerald ash borer , agrilus , biology , fraxinus , pest analysis , population , ecology , invasive species , botany , demography , sociology
The emerald ash borer Agrilus planipennis F airmaire is a serious invasive forest pest of ash ( Fraxinus ) trees in N orth A merica. 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 M ichigan. Life table analysis showed that the net population growth rates ( R 0 ) 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 I ngham C o. 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, R 0 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 G ratiot and S hiawassee C os. The sudden decrease in R 0 of both experimental and wild A. planipennis cohorts in the I ngham C o. sites corresponded with increases in parasitism by hymenopteran parasitoids Atanycolus spp. (native) and Tetrastichus planipennisi Y ang (introduced), as well as an increase in woodpecker predation, indicating the role of these natural enemies in regulation of the pest's population dynamics.