Canker and twig dieback of blueberry caused by Pestalotiopsis spp. and a Truncatella sp in Chile

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dc.contributor.authorEspinoza, Jose G.
dc.contributor.authorBriceno, Erika X.
dc.contributor.authorKeith, Lisa M.
dc.contributor.authorLatorre, Bernardo A.
dc.date.accessioned2024-01-10T12:04:32Z
dc.date.available2024-01-10T12:04:32Z
dc.date.issued2008
dc.description.abstractBlueberry (Vaccinium spp.) has great economic importance in Chile, which currently has about 8,500 ha being cultivated. Recently, the presence of canker and dieback symptoms has been observed along the productive blueberry zone of Chile. Species of Pestalotiopsis and Truncatella were consistently isolated from diseased samples in 22 different locations. Therefore, the objective of this study was to identify and characterize the species of Pestalotiopsis and Truncatella associated with canker and twig dieback symptoms on blueberry. Forty-nine isolates were ob- tained on acidified potato dextrose agar in 2006 and 2007. These isolates were identified as Pestalotiopsis clavispora, P neglecta, and Truncatella (=Pestalotia) angustata on the basis of colony characteristics and conidial morphology. This identification was verified by internal transcribed spacer analysis of DNA. Isolates of P. clavispora, P. neglecta, and T angustata were pathogenic on apple, kiwifruit, and blueberry fruit. Similarly, isolates of P. clavispora were pathogenic on detached blueberry twigs of cv. O'Neal. Additionally, three selected isolates of P. clavispora induced light-brown canker lesions, surrounded by a reddish halo, and shoot dieback after twig inoculations on 2-year-old twigs of blueberry cvs. O'Neal, Bluecrop, Brightwell, Brigitta, Duke, Elliot, and Misty. Among blueberry cultivars, Brightwell and O'Neal were the most susceptible and Bluecrop and Misty the least susceptible, while Elliot, Brigitta, and Duke were moderately susceptible to P. clavispora. These pathogens were isolated consistently from inoculated plants, confirming Koch's postulates. P. clavispora was highly sensitive to fludioxonil and pyraclostrobin with a median effective concentration of 0.06 to 0.08 and 0.04 to 0.8 mu g/ml, respectively. Therefore, the results of this study indicate that P. clavispora, P. neglecta, and T angustata are primary pathogens that can cause canker lesions and dieback symptoms on blue- berry not previously described in Chile. However, these results do not exclude that other species of these genera or other plant-pathogenic fungi (e.g., Botryosphaeria, Pestalotia, and Phomopsis spp.) may eventually be involved in this syndrome of blueberry.
dc.description.funderPontificia Universidad Catolica de Chile
dc.fechaingreso.objetodigital2024-04-30
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1094/PDIS-92-10-1407
dc.identifier.eissn1943-7692
dc.identifier.issn0191-2917
dc.identifier.pubmedidMEDLINE:30769572
dc.identifier.urihttps://doi.org/10.1094/PDIS-92-10-1407
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75825
dc.identifier.wosidWOS:000259345900005
dc.information.autorucAgronomía e Ing. Forestal;Espinoza J;S/I;166148
dc.information.autorucAgronomía e Ing. Forestal;Latorre B;S/I;98977
dc.issue.numero10
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final1414
dc.pagina.inicio1407
dc.publisherAMER PHYTOPATHOLOGICAL SOC
dc.revistaPLANT DISEASE
dc.rightsacceso restringido
dc.subjecthighbush blueberry
dc.titleCanker and twig dieback of blueberry caused by Pestalotiopsis spp. and a Truncatella sp in Chile
dc.typeartículo
dc.volumen92
sipa.codpersvinculados166148
sipa.codpersvinculados98977
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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