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Australasian Plant Pathology

, Volume 36, Issue 5, pp 407–414 | Cite as

Ceratocystis atrox sp. nov. associated with Phoracantha acanthocera infestations on Eucalyptus grandis in Australia

  • Marelize van WykEmail author
  • Geoff Pegg
  • Simon Lawson
  • Michael J. Wingfield
Article

Abstract

Ceratocystis spp. include important pathogens of trees as well as apparently saprophytic species. Four species have been recorded on Eucalyptus grandis in Australia, of which only one, C. pirilliformis Barnes and M.J. Wingf., is known to be pathogenic. A recent survey of pests and diseases of Eucalyptus trees in northern Queensland revealed a species of Ceratocystis associated with the tunnels made by the aggressive wood-boring insect Phoracantha acanthocera (Macleay) (Cerambicydae: Coleoptera). The aim of the present study was to identify the fungus based on morphological characteristics and comparisons of DNA sequence data for three gene regions. The fungus peripherally resembles C. fimbriata Ell. and Halst. but differs from this species most obviously by having much darker mycelium, longer ascomatal necks, segmented hyphae and an absence of aleuroconidia. Comparisons of combined sequence data confirmed that the Ceratocystis sp. from P. acanthocera represents an undescribed taxon, which is provided with the name Ceratocystis atrox sp. nov. C. atrox appears to have a close relationship with P. acanthocera, although its role in the biology of the insect is unknown and its pathogenicity has not been considered.

Additional keywords

bark beetles Coleoptera Scolytinae sap stain 

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Copyright information

© Australasian Plant Pathology Society 2007

Authors and Affiliations

  • Marelize van Wyk
    • 1
    Email author
  • Geoff Pegg
    • 2
  • Simon Lawson
    • 2
  • Michael J. Wingfield
    • 1
  1. 1.Department of Genetics, Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI)University of PretoriaPretoriaSouth Africa
  2. 2.Department of Primary Industries and FisheriesIndooroopillyAustralia

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