The genus Raffaelea was established in 1965 when the type species, Raffaelea ambrosia, a symbiont of Platypus ambrosia beetles was described. Since then, many additional ambrosia beetle symbionts have been added to the genus, including the important tree pathogens Raffaelea quercivora, Raffaelea quercus-mongolicae, and Raffaelea lauricola, causal agents of Japanese and Korean oak wilt and laurel wilt, respectively. The discovery of new and the dispersal of described species of Raffaelea to new areas, where they can become invasive, presents challenges for diagnosticians as well as plant protection and quarantine efforts. In this paper, we present the first comprehensive multigene phylogenetic analysis of Raffaelea. As it is currently defined, the genus was found to not be monophyletic. On the basis of this work, Raffaelea sensu stricto is defined and the affinities of undescribed isolates are considered.
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http://dx.doi.org/10.1016/j.funbio.2014.09.001 | DOI Listing |
Phytopathology
August 2024
Department of Plant Sciences, University of Cambridge, Cambridge, U.K.
This scientometric study reviews the scientific literature and CABI distribution records published in 2022 to find evidence of major disease outbreaks and first reports of pathogens in new locations or on new hosts. This is the second time we have done this, and this study builds on our work documenting and analyzing reports from 2021. Pathogens with three or more articles identified in 2022 literature were , , species complexes, ' Liberibacter asiaticus', , formae specialis, and f.
View Article and Find Full Text PDFFront Microbiol
April 2023
Chair of Forest Entomology and Protection, Institute of Forestry, University of Freiburg, Freiburg im Breisgau, Germany.
Some fungus-farming ambrosia beetles rely on multiple nutritional cultivars (Ascomycota: Ophiostomatales and/or yeasts) that seem to change in relative abundance over time. The succession of these fungi could benefit beetle hosts by optimal consumption of the substrate and extended longevity of the nest. However, abundances of fungal cultivars and other symbionts are poorly known and their culture-independent quantification over development has been studied in only a single species.
View Article and Find Full Text PDFFront Microbiol
March 2023
Tropical Research and Education Center, University of Florida, Homestead, FL, United States.
Introduction: Ambrosia beetles maintain strict associations with specific lineages of fungi. However, anthropogenic introductions of ambrosia beetles into new ecosystems can result in the lateral transfer of their symbionts to other ambrosia beetles. The ability of a Florida endemic ambrosia beetle, , to feed and establish persistent associations with two of its known symbionts ( and ) and two other fungi ( and sp.
View Article and Find Full Text PDFPlant Dis
November 2022
University of Kentucky, Department of Forestry and Natural Resources, Lexington, Kentucky, United States.
Laurel wilt (LW) is a vascular disease caused by the fungus (previously ) and transmitted by its primary vector, the redbay ambrosia beetle (, RAB), both of which were first detected in the United States (US) in 2002, likely introduced from their native range in Asia (Fraedrich et al. 2008; Harrington et al. 2008).
View Article and Find Full Text PDFProc Biol Sci
November 2022
Chair of Forest Entomology and Protection, Institute of Forestry, University of Freiburg, Fohrenbühl 27, 79252 Stegen-Wittental, Germany.
Fungal cultivation is a defining feature for advanced agriculture in fungus-farming ants and termites. In a third supposedly fungus-farming group, wood-colonizing ambrosia beetles, an experimental proof for the effectiveness of beetle activity for selective promotion of their food fungi over others is lacking and farming has only been assumed based on observations of social and hygienic behaviours. Here, we experimentally removed mothers and their offspring from young nests of the fruit-tree pinhole borer, .
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