European Journal of Plant Pathology (2009) 125, 109-118

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Guillermo Pérez, Gavin C. Hunter, Bernard Slippers, Carlos Pérez, Brenda D. Wingfield and Michael J. Wingfield (2009)
Teratosphaeria (Mycosphaerella) nubilosa, the causal agent of Mycosphaerella leaf disease (MLD), recently introduced into Uruguay
European Journal of Plant Pathology 125 (1), 109-118
Abstract: Mycosphaerella leaf disease on Eucalyptus is well known in Uruguay but none of the more serious Mycosphaerella spp. and Teratosphaeria spp. causing this disease have yet been found. In the autumn of 2007, more severe defoliation than has been known in the past and associated with symptoms resembling Mycosphaerella infections was observed on Eucalyptus globulus. Isolations and identifications based on morphology and DNA sequence comparisons showed that the causal agent of the defoliation is the well known and serious pathogen Teratosphaeria nubilosa (=Mycosphaerella nubilosa). This is the first record of the pathogen in South America. Using ten microsatellite loci previously developed for T. nubilosa, only one multilocus haplotype was found from 46 T. nubilosa collected isolates. Interestingly, this haplotype was the same as one previously found in Portugal and Spain. The results suggest that T. nubilosa has recently been introduced into Uruguay and that it most likely originated from the Iberian Peninsula where E. globulus is widely planted.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Brenda D. Wingfield, Michael J. Wingfield, Bernard Slippers, Gavin C. Hunter

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

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

Teratosphaeria nubilosa Eucalypt (Eucalyptus) Uruguay