Forest products imported intra-continentally are potential pathways for
introducing native insect species into areas where they were not previously found. While
the risk associated with importation of exotic insects into foreign lands is well
documented, native species pose similar threats. Ecological risk assessments were
conducted on seven species of native insects (Tetropium velutinum LeConte, and
Pygoleptura nigrella [Say] [Coleoptera: Cerambycidae], Phaenops drummondi [Kirby]
[Coleoptera: Buprestidae], Stephanopachys substriatus [Paykull] [Coleoptera:
Bostrichidae], Dendroctonus pseudotsugae Hopkins and Scolytus laricis Blackman
[Coleoptera: Scolytidae], and Camponotus noveboracensis [Fitch] [Hymenoptera:
Formicidae]) that emerged from western larch logs imported into northern Minnesota.
The ecological risk of each species was assessed considering the following factors:
economic impact, host specificity, potential for associated organisms, survey potential,
pathway potential, establishment potential, and mitigation potential. Following
suggestions provided in this document will minimize the likelihood that more western forest insect species will be introduced into Minnesota and other areas of the US.
This work was
supported by a University of Minnesota Rapid Agricultural Response Grant to DWG and
SJS, by funding from the USDA Forest Service, Forest Health Protection Suppression
Program to DWG (No. 1Z71AR210141715621, M. Connor, Cooperator) and by funding
from the Minnesota Agricultural Experiment Station (Projects # MIN-42-034 and MN-
17-070). Support was also provided by the University of Minnesota College of Natural
Dodds, Kevin J.; Gilmore, Daniel W.; Seybold, Steven J..
Ecological risk assessments for insect species emerged from western larch imported to northern Minnesota..
University of Minnesota.
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