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Davis R.I.,Northern Australia Quarantine Strategy NAQS | Henderson J.,University of Queensland | Jones L.M.,Northern Australia Quarantine Strategy NAQS | McTaggart A.R.,University of Pretoria | And 4 more authors.
Australasian Plant Disease Notes | Year: 2015

Phytoplasmas were detected by nested and real time PCR from wilted cooking banana plants in Solomon Islands close to the border with Papua New Guinea (PNG). These phytoplasmas and two similar phytoplasmas found adjacent in PNG formed a group from the Solomon Island archipelago indistinguishable from each other by sequence analysis. These and similar phytoplasmas from the island of New Guinea were most closely related to phytoplasmas in the16SrXXII-A group. © 2015, Australasian Plant Pathology Society Inc.


James R.S.,Northern Australia Quarantine Strategy NAQS | Ray J.,Northern Australia Quarantine Strategy NAQS | Tan Y.P.,Plant Pathology Herbarium | Shivas R.G.,Plant Pathology Herbarium
Australasian Plant Disease Notes | Year: 2014

Four species, Colletotrichum asianum, C. queenslandicum, C. siamense and C. theobromicola, were isolated and identified from several plants species in the Northern Territory, Australia. Some of these fungal associations represent first reports, namely, C. queenslandicum on Passiflora edulis; C. siamense on Artocarpus heterophyllus, Eriobotrya japonica, Ficus carica, Mentha sp., Piper nigrum, Rosmarinus officinalis and Theobroma cacao; and C. theobromicola on Coffea canephora and C. arabica. Colletotrichum asianum was isolated from mango for the first time in the NT. These collections help provide evidence for the absence of Colletotrichum spp. of biosecurity importance in the Northern Territory. © 2014, Australasian Plant Pathology Society Inc.


Davis R.I.,Northern Australia Quarantine Strategy NAQS | Kokoa P.,National Agricultural Quarantine and Inspection Authority NAQIA | Jones L.M.,Northern Australia Quarantine Strategy NAQS | MacKie J.,Australian Department of Primary Industries and Fisheries | And 4 more authors.
Australasian Plant Disease Notes | Year: 2012

Nested PCR indicated a possible causal relationship between presence of phytoplasmas and unusual wilt symptoms in cooking banana plants in PNG. Sequence analysis showed that phytoplasmas from diseased banana plants in four Provinces were unique, but most closely related to a phytoplasma associated with a new lethal disease of coconuts in PNG's Madang Province, related to phytoplasmas in the 16SrIV group. © 2012 Australasian Plant Pathology Society Inc.


Jones L.M.,Northern Australia Quarantine Strategy NAQS | Grice K.R.E.,Center for Tropical Agriculture | Davis R.I.,Northern Australia Quarantine Strategy NAQS
Australasian Plant Pathology | Year: 2010

Five pathogen-host leaf tissue combinations were used to determine whether dried plant disease material(γ) irradiated at a level of 25 kGy retains diagnostic value when subjected to selected polymerase chain reaction-based assays. Diagnostic amplification of nucleic acids from all anticipated positive samples was successful following γ irradiation. Variability in results is discussed in relation to sample handling. © Australasian Plant Pathology Society 2010.


Davis R.I.,Northern Australia Quarantine Strategy NAQS | Taylor R.K.,Plant Health and Environment Laboratory | Rouse D.,Plant Health and Environment Laboratory | Flack M.,Elizabeth Macarthur Agricultural Institute | And 6 more authors.
Australasian Plant Disease Notes | Year: 2015

Citrus canker disease was detected for the first time in Solomon Islands on Guadalcanal Island. The bacterium was isolated from diseased citrus plants exhibiting distinct citrus canker symptoms consisting of crater-like lesions on the rind of fruit and corky yellow-brownish lesions on leaves. Xanthomonas citri subsp. citri was identified using biochemical and molecular tests and confirmed as the causal agent by fulfilling Koch’s postulates. © 2015, Australasian Plant Pathology Society Inc.

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