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The pathogenicity of isolates of Endothia gyrosa to Eucalyptus nitens and E. globulus

The pathogenicity of isolates of Endothia gyrosa to Eucalyptus nitens and E. globulus A severe epidemic of Endothia gyrosa in a plantation of Eucalyptus nitens at Tewkesbury in Tasmania prompted a comparison of the pathogenicity of isolates from this site with that of isolates from elsewhere in Tasmania and mainland Australia. Sixteen isolates were artificially inoculated on 12-month-old seedlings of two major plantation species, E. nitens and E. globulus. The majority of isolates produced lesions on both host species that were significantly different in size to those in non-inoculated seedlings and were not callused-over at 7 months after inoculation. Seedling mortality was negligible. Certain isolates originating from various regions in mainland Australia and from the Tewkesbury site appeared more pathogenic although differences in lesion size between isolates was not always significant. Only one out of seven isolates from Tewkesbury demonstrated significantly higher levels of pathogenicity than all other isolates although there was a trend for isolates from this site to cause greater lesions in size. It is, however, unlikely that the epidemic caused by E. gyrosa at Tewkesbury, even though of far greater impact than previousiy observed on plantations in Australia, is solely the consequence of more pathogenic strains. This conclusion does not exclude the possibility that more pathogenic strains of an opportunist pathogen such as E. gyrosa could have played some determinant role in epidemic development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

The pathogenicity of isolates of Endothia gyrosa to Eucalyptus nitens and E. globulus

Yuan, Z.; Mohammed, C.
Australasian Plant Pathology , Volume 29 (1) – Jan 28, 2011
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References (24)

Publisher
Springer Journals
Copyright
Copyright © 2000 by Australasian Plant Pathology Society
Subject
Life Sciences; Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1071/AP00005
Publisher site
See Article on Publisher Site

Abstract

A severe epidemic of Endothia gyrosa in a plantation of Eucalyptus nitens at Tewkesbury in Tasmania prompted a comparison of the pathogenicity of isolates from this site with that of isolates from elsewhere in Tasmania and mainland Australia. Sixteen isolates were artificially inoculated on 12-month-old seedlings of two major plantation species, E. nitens and E. globulus. The majority of isolates produced lesions on both host species that were significantly different in size to those in non-inoculated seedlings and were not callused-over at 7 months after inoculation. Seedling mortality was negligible. Certain isolates originating from various regions in mainland Australia and from the Tewkesbury site appeared more pathogenic although differences in lesion size between isolates was not always significant. Only one out of seven isolates from Tewkesbury demonstrated significantly higher levels of pathogenicity than all other isolates although there was a trend for isolates from this site to cause greater lesions in size. It is, however, unlikely that the epidemic caused by E. gyrosa at Tewkesbury, even though of far greater impact than previousiy observed on plantations in Australia, is solely the consequence of more pathogenic strains. This conclusion does not exclude the possibility that more pathogenic strains of an opportunist pathogen such as E. gyrosa could have played some determinant role in epidemic development.

Journal

Australasian Plant Pathology – Springer Journals

Published: Jan 28, 2011

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