Studies in Mycology (2004) 50, 343-358

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Bernard Slippers, Gerda Fourie, Pedro W. Crous, Teresa A. Coutinho, Brenda D. Wingfield, Angus-J. Carnegie and Michael J. Wingfield (2004)
Speciation and distribution of Botryosphaeria spp. on native and introduced Eucalyptus trees in Australia and South Africa
Studies in Mycology 50, 343-358
Abstract: Botryosphaeria spp. are important canker and die-back pathogens that affect Eucalyptus spp. They also occur endophytically in Eucalyptus leaves and stems. For the purpose of this study, Botryosphaeria strains were isolated from diseased and symptomless Eucalyptus material from Australia and South Africa. These isolates were induced to sporulate in culture, and compared with known species of Botryosphaeria. Selected isolates were also compared with authentic isolates of known Botryosphaeria spp. based on nuclear DNA sequence data of the ITS rDNA, b-tubulin and elongation factor 1-alpha regions. Five Botryosphaeria spp. were identified from Eucalyptus plants. The ITS rDNA sequence data were then used to develop a PCR RFLP technique that could distinguish these species. Botryosphaeria eucalyptorum and a new species, B. eucalypticola, were the most common species on Eucalyptus in eastern Australia. These species also occur on Eucalyptus in South Africa, where they have most likely been introduced. Botryosphaeria parva was common on Eucalyptus in exotic environments, but rare on this host in Australia. Although B. dothidea was previously thought to be common on eucalypts, only one isolate of each of B. dothidea and B. australis were found in all the areas surveyed. No isolates of B. ribis, which was also commonly reported from Eucalyptus, were identified during this survey from Eucalyptus. Data from the present study provide the first holistic overview of the species of Botryosphaeria associated with Eucalyptus in both native and exotic environments.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Bernard Slippers, Pedro W. Crous, Brenda D. Wingfield, Michael J. Wingfield, Teresa A. Coutinho

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Lasiodiplodia theobromae Vitex (crop) Uganda
Diplodia mutila Ash (Fraxinus) Netherlands
Botryosphaeria (genus)
Botryosphaeria dothidea Poplar/aspen (Populus) New Zealand
Botryosphaeria dothidea Prunus (genus - other than fruit trees) Switzerland
Diplodia seriata Currant/gooseberry (Ribes) U.S.A. (NE)
Neofusicoccum eucalyptorum Eucalypt (Eucalyptus) Australia (South+SE)
Neofusicoccum eucalyptorum Eucalypt (Eucalyptus) South Africa
Neofusicoccum eucalyptorum Eucalypt (Eucalyptus) Australia (NT+QLD)
Neofusicoccum ribis Currant/gooseberry (Ribes) U.S.A. (NE)
Neofusicoccum parvum Currant/gooseberry (Ribes)
Neofusicoccum parvum Poplar/aspen (Populus) New Zealand
Neofusicoccum parvum Eucalypt (Eucalyptus) South Africa
Neofusicoccum parvum Kiwi (Actinidia) New Zealand
Neofusicoccum parvum Tibouchina (crop) Australia (South+SE)
Neofusicoccum luteum Grapevine (Vitis) Portugal (continental)
Neofusicoccum luteum Kiwi (Actinidia) New Zealand
Neofusicoccum australe Acacia (crop) Australia (South+SE)
Neofusicoccum eucalypticola Eucalypt (Eucalyptus) Australia (South+SE)