Pathogenicity of nectriaceous fungi on avocado in Australia
Article
Article Title | Pathogenicity of nectriaceous fungi on avocado in Australia |
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ERA Journal ID | 2639 |
Article Category | Article |
Authors | Parkinson, Louisamarie E. (Author), Shivas, Roger G. (Author) and Dann, Elizabeth K. (Author) |
Journal Title | Phytopathology: International Journal of the American Phytopathological Society |
Journal Citation | 107 (12), pp. 1479-1485 |
Number of Pages | 7 |
Year | 2017 |
Publisher | American Phytopathological Society |
Place of Publication | United States |
ISSN | 0031-949X |
1943-7684 | |
Digital Object Identifier (DOI) | https://doi.org/10.1094/PHYTO-03-17-0084-R |
Abstract | Black root rot is a severe disease of young avocado trees in Australia causing black necrotic roots, tree stunting, and leaf drop prior to tree death. Nectriaceous fungi (Nectriaceae, Hypocreales), are commonly isolated from symptomatic roots. This research tested the pathogenicity of 19 isolates from Calonectria, Cylindrocladiella, Dactylonectria, Gliocladiopsis, and Ilyonectria, spp. collected from young avocado trees and other hosts. Glasshouse pathogenicity tests with ‘Reed’ avocado (Persea americana) seedlings confirmed that Calonectria ilicicola is a severe pathogen of avocado, causing stunting, wilting, and seedling death within 5 weeks of inoculation. Isolates of C. ilicicola from peanut, papaya, and custard apple were also shown to be aggressive pathogens of avocado, demonstrating a broad host range. An isolate of a Calonectria sp. from blueberry and avocado isolates of Dactylonectria macrodidyma, D. novozelandica, D. pauciseptata, and D. anthuriicola caused significant root rot but not stunting within 5 to 9 weeks of inoculation. An isolate of an Ilyonectria sp. from grapevine closely related to Ilyonectria liriodendri, and avocado isolates of Cylindrocladiella pseudoinfestans, Gliocladiopsis peggii, and an Ilyonectria sp. were not pathogenic to avocado. |
Keywords | Dactylonectria novozelandica, Dactylonectria pauciseptata, Ilyonectria liriodendri |
ANZSRC Field of Research 2020 | 310805. Plant pathology |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Department of Agriculture and Fisheries, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4944/pathogenicity-of-nectriaceous-fungi-on-avocado-in-australia
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