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Multiple incursions and putative species revealed using a mitochondrial and nuclear phylogenetic approach to the Trogoderma variabile (Coleoptera: Dermestidae) trapping program in Australia

Published online by Cambridge University Press:  13 January 2011

M.A. Castalanelli ,
K.M. Mikac ,
A.M. Baker ,
K. Munyard ,
M. Grimm  and
D.M. Groth
M.A. Castalanelli*
Affiliation:
Cooperative Research Centre for National Plant Biosecurity, Deakin, ACT, Australia Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, Curtin University of Technology, Perth, Australia Division of Biosecurity and Research, Department of Agriculture Western Australia, WA, 6151, Australia
K.M. Mikac
Affiliation:
Institute for Conservation Biology and Environmental Management, University of Wollongong, Wollongong, NSWAustralia
A.M. Baker
Affiliation:
Discipline of Biogeoscience, Faculty of Science and Technology, Queensland University of Technology, Brisbane, QLD, Australia
K. Munyard
Affiliation:
Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, Curtin University of Technology, Perth, Australia
M. Grimm
Affiliation:
Division of Biosecurity and Research, Department of Agriculture Western Australia, WA, 6151, Australia
D.M. Groth
Affiliation:
Curtin Health Innovation Research Institute, Western Australian Biomedical Research Institute, Curtin University of Technology, Perth, Australia
*
*Author for correspondence Fax: +61 8 9266 2342 E-mail: mark.castalanelli@agric.wa.gov.au
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Abstract

The Warehouse beetle, Trogoderma variabile (Coleoptera: Dermestidae), is an internationally significant invasive pest of packed goods and stored grain. When it was first documented in Australia at Griffith, New South Wales, in 1977, an eradication campaign was initiated. After several years and considerable effort, the eradication campaign was abandoned. To monitor the presence and spread of T. variabile, surveys were carried out by government agencies in 1992 and 2002. When survey data was compared, it was concluded that the distribution of morphologically identified T. variabile had doubled in most Australian states. Here, we used samples from the 2002 survey to conduct a phylogenetic study using partial sequences of mitochondrial genes Cytochrome oxidase I and Cytochrome B, and the nuclear gene 18S, to examine the distribution and dispersal of T. variabile and detect the presence of misidentified species. Based on our molecular results, we show that only 47% of the samples analysed were T. variabile, and the remaining were a mixture of six putative species. In addition, T. variabile was found in only 78% of the trapping sites. We discuss the importance of correct diagnosis in relation to the eradication campaign.

Keywords

Warehouse beetlepopulationcrypticmoleculareradicationinvasivecorrect diagnosis
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 101 , Issue 3 , June 2011 , pp. 333 - 343
Copyright
Copyright © Cambridge University Press 2011

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