First report of box blight caused by <i>Cylindrocladium buxicola</i> in Georgia

Gorgiladze, L.; Meparishvili, G.; Sikharulidze, Z.; Natsarishvili, K.; Davitadze, Ruslan

doi:10.5197/j.2044-0588.2011.023.024

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…Box blight seriously affects the aesthetics of host plants (EPPO, ; LaMondia et al ., ), often making them unmarketable (Ivors & LeBude, ) or in case of heavy infections of young plants, killing them. In addition to this substantial economic impact, the disease also affects historical boxwood gardens (Groen & Zieleman, ) and wild boxwood populations (Henricot, ; Gorgiladze et al ., ) throughout Europe and Asia.…”

Section: Introductionmentioning

confidence: 99%

Characterization and taxonomic reassessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov.

et al. 2015

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Calonectria pseudonaviculata, the causal agent of the disease of Buxus spp. known as 'box blight', was first detected in the mid-1990s in the UK and New Zealand. Since then, the geographic range of box blight has rapidly expanded to at least 21 countries throughout temperate regions of the world, causing significant losses in nurseries, gardens and wild boxwood populations. This study determined the genetic diversity in a collection of 234 Calonectria isolates from diseased Buxus plants, originating from 15 countries and four continents. Two genetic clades, G1 and G2, were identified within this sample using multilocus phylogenetic analysis. The application of genealogical concordance phylogenetic species recognition criteria using four independent nuclear loci determined that the Calonectria isolates in these two clades are separate phylogenetic species. The isolates in the G1 clade were upheld as C. pseudonaviculata sensu stricto. Based on phylogenetic distinctiveness and the lack of mating, a new species is proposed, Calonectria henricotiae sp. nov., for the Calonectria isolates in the G2 clade. A PCR-RFLP assay and real-time PCR assays were developed to easily and reproducibly differentiate these species. To assess the practical implications of the identification of the two species, their physiology, fungicide susceptibility and pathogenicity were compared. No differences in pathogenicity were observed. However, C. henricotiae isolates exhibited greater thermotolerance and reduced sensitivity to specific triazole as well as strobilurin fungicides. The identification of a second phylogenetic species causing box blight may have a substantial impact on the epidemiology and control of this destructive disease.

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Section: Introductionmentioning

confidence: 99%

Characterization and taxonomic reassessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov.

et al. 2015

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“…Although the reports of the disease were officially published in 2002, Henricot and Culham (2002) indicated that disease symptoms were first observed in 1994 in the UK. The pathogen has since spread throughout Europe and North America (Akilli et al 2012;Cech et al 2010;Crepel and Inghelbrecht 2003;Elmhirst, Auxier, and Wegener, 2013;Gorgiladze et al 2011;Ivors et al 2012;Saurat et al 2012;Varela et al 2009). Originally confirmed in several states on both coasts of the United States, C. pseudonaviculata has since spread up and down both coasts, as well as most of the eastern United States (Figure 1).…”

Section: Introductionmentioning

confidence: 95%

Survival of Lab Grown Calonectria pseudonaviculata Microsclerotia During Small-Scale Composting

Harvey

Davis

Shishkoff

et al. 2019

Compost Science & Utilization

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Boxwood blight, caused by Calonectria pseudonaviculata, is a devastating fungal disease of Buxus spp., first observed in the United States in 2011. Due to the persistent nature of the produced microsclerotia, concern arose over the potential for compost to serve as a disease vector. Previous work demonstrated that C. pseudonaviculata is very stable at mesophilic temperatures, however, no previous work has evaluated C. pseudonaviculata during composting. Our objective was to evaluate the survival of C. pseudonaviculata microsclerotia after being composted for 24, 48, and 72 h at temperatures of 40, 50, and 60 C. Composting was performed using a newly created bioreactor system, allowing for precise control of the composting process. In conjunction with the composting evaluations, the same temperature/time combinations were evaluated in incubators. While the pathogen survived 40 C through 72 h in an incubator, compost survival was minimal, with only some survival observed at 24 h at the same temperature. We were able to determine that exposure to temperatures !50 C for 24 h or longer, and that exposure in a composting system for 48 h or longer at 40 C would kill the microsclerotia.

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“…and in Georgia (Gorgiladze et al, 2011), which is a neighbouring country to the east of Turkey. This disease is also known in the USA (Norm et al, 2011) and New Zealand (Crous et al, 2002).…”

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confidence: 99%

First report of box blight caused by Cylindrocladium pseudonaviculatum in the Eastern Black Sea region of Turkey

Akıllı

Katırcıoğlu

Zor

et al. 2012

New Disease Reports

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First report of box blight caused by Cylindrocladium buxicola in Georgia

Cited by 25 publications

References 7 publications

Characterization and taxonomic reassessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov.

Characterization and taxonomic reassessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov.

Survival of Lab Grown Calonectria pseudonaviculata Microsclerotia During Small-Scale Composting

First report of box blight caused by Cylindrocladium pseudonaviculatum in the Eastern Black Sea region of Turkey

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