Potential susceptibility of Australian flora to a NA2 isolate of Phytophthora ramorum and pathogen sporulation potential

K.B. Ireland; D. Hüberli; B. Dell; I.W. Smith; D.M. Rizzo; G.E.St.J. Hardy

doi:10.1111/j.1439-0329.2011.00755.x

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Potential susceptibility of Australian flora to a NA2 isolate of Phytophthora ramorum and pathogen sporulation potential

Journal article

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Potential susceptibility of Australian flora to a NA2 isolate of Phytophthora ramorum and pathogen sporulation potential

K.B. Ireland, D. Hüberli, B. Dell, I.W. Smith, D.M. Rizzo and G.E.St.J. Hardy

Forest Pathology, Vol.42(4), pp.305-320

2012

DOI: https://doi.org/10.1111/j.1439-0329.2011.00755.x

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Abstract

Phytophthora ramorum is an invasive plant pathogen and the cause of considerable and widespread damage in nurseries, gardens and natural woodland ecosystems of the USA and Europe. It is considered to be a significant plant disease as it could cause biodiversity loss and severe economic losses in plant industries in areas where it is not yet known to exist, such as Australasia. Foliar susceptibility and sporulation potential were tested using detached-leaf assays for 70 Australian native plant species sourced from established gardens and arboreta in California using a NA2 isolate of P. ramorum. Correa‘Sister Dawn’, Eucalyptus regnans, Isopogon cuneatus, I. formosus, Leptospermum scoparium, L. lanigerum and Melaleuca squamea were identified as potentially highly susceptible host species. Hedycarya angustifolia, Olearia argophylla, Phyllocladus aspleniifolius, Pittosporum undulatum and Podocarpus lawrencei were identified as potentially resistant. All 70 species were able to be infected with P. ramorum, as confirmed by reisolation. Putative sporulating hosts include five members of the Myrtaceae, Agonis flexuosa, Corymbia ficifolia, Eucalyptus haemastoma, E. delegatensis and E. viminalis. As a part of a precautionary strategy, the potentially highly susceptible species found in this study are suitable candidates for targeted surveillance programmes in high-risk incursion areas of Australia and within the global horticultural trade.

Details

Title: Potential susceptibility of Australian flora to a NA2 isolate of Phytophthora ramorum and pathogen sporulation potential
Authors/Creators: K.B. Ireland (Author/Creator) - Murdoch University
D. Hüberli (Author/Creator) - Murdoch University
B. Dell (Author/Creator) - Murdoch University
I.W. Smith (Author/Creator) - The University of Melbourne
D.M. Rizzo (Author/Creator) - University of California, Davis
G.E.St.J. Hardy (Author/Creator) - Murdoch University
Publication Details: Forest Pathology, Vol.42(4), pp.305-320
Publisher: Blackwell Publishing
Identifiers: 991005544052007891
Murdoch Affiliation: Centre for Phytophthora Science and Management; School of Biological Sciences and Biotechnology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.97 Plant Pathology; 3.97.1439 Phytophthora Management
Web Of Science research areas: Forestry
ESI research areas: Plant & Animal Science