Variability in aggressiveness of Quambalaria pitereka isolates

Geoff S Pegg; L S Shuey; A J Carnegie; M J Wingfield; A Drenth

doi:10.1111/j.1365-3059.2011.02478.x

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Variability in aggressiveness of Quambalaria pitereka isolates

Journal article

Peer reviewed

Variability in aggressiveness of Quambalaria pitereka isolates

Geoff S Pegg, L S Shuey, A J Carnegie, M J Wingfield and A Drenth

Plant Pathology, Vol.60(6), pp.1107-1117

2011

DOI: https://doi.org/10.1111/j.1365-3059.2011.02478.x

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Abstract

Australia

Corymbia

Eucalyptus

fungal disease

plantation forestry

spotted gum

Quambalaria shoot blight, caused by the fungal pathogen Quambalaria pitereka, is a serious disease of eucalypt plantations in Australia. The aggressiveness of four Q. pitereka isolates was compared on a range of host genera, species, provenances and clones. Isolates differed substantially in their aggressiveness, with two consistently showing higher levels of aggressiveness based on incidence and severity of disease and lesion size. Isolates derived from Corymbia citriodora subsp. variegata (Ccv) and C. torelliana were shown to have a relatively restricted host range, with lesions but no sporulation found on Eucalyptus species, Angophora species other than A. costata and Corymbia species other than Ccv, the host of origin. The level of aggressiveness toward the different provenances of spotted gum and C. torelliana varied between isolates and there was evidence of some isolate×host interaction within provenances of Ccv. The two methods of inoculation used in this study, spray and spot inoculation, gave similar results. However, the fact that the spot inoculation method was labour-intensive was a disadvantage limiting the numbers of isolates and hosts that can be tested. © 2011 The Authors. Plant Pathology © 2011 BSPP.

Details

Title: Variability in aggressiveness of Quambalaria pitereka isolates
Authors: Geoff S Pegg (Author) - University of Queensland
L S Shuey (Author) - Agri-Science Queensland
A J Carnegie (Author) - Forest Science Centre, Industry & Investment NSW
M J Wingfield (Author) - University of Pretoria, South Africa
A Drenth (Author) - University of Queensland
Publication details: Plant Pathology, Vol.60(6), pp.1107-1117
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2011
DOI: 10.1111/j.1365-3059.2011.02478.x
ISSN: 0032-0862
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450093602621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Agronomy; Plant Sciences