First report of shoot blight and branch canker of Pyrus communis by Neoscytalidium novaehollandiae in Turkey

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dc.contributor.authorOksal, E
dc.contributor.authorOzer, G
dc.date.accessioned2022-03-09T12:26:55Z
dc.date.available2022-03-09T12:26:55Z
dc.date.issued2021en_US
dc.departmentMTÖ Üniversitesi, Ziraat Fakültesi, Bitki Koruma Bölümüen_US
dc.description.abstractTurkey is the world’s fifth-largest pear (Pyrus communis L.) producer with a production of 503.000 tons and a cultivated area of 26.000 ha (FAOSTAT 2020). In June 2019, symptoms of shoot blight and branch canker showing intensely dark wood discoloration, and dieback were observed on about 10% of pear trees (cv. Deveci) in two commercial orchards, 70 km away from each other in Battalgazi (38.466659 N 38.343073E) and Doğanşehir (38.085506 N 37.896307E) districts in Malatya province, Turkey. Small pieces of symptomatic tissues (5–10 mm2) were excised from symptomatic tissues of stems/branches and subjected to surface disinfection by immersing them in 1% NaOCl for 1 min and in sterile water twice. Pieces of tissues were then plated onto potato dextrose agar (PDA). Finally, four isolates were obtained after an incubation period at room temperature for five days and purified on PDA. The isolates were developed as dark gray to black with abundant arthroconidia in aerial mycelia. Arthroconidia (n?=?50) were thick-walled, 0 to 1 septate, rod-shaped, 5.1 to 9.7?×?3.1 to 4.6 ?m, and formed singly or in arthric chains. Pycniospores (n?=?50) produced on pine needles on 1.5% water agar were hyaline, ellipsoidal, 0–1-septate, 2.9 to 4.2?×?11.9 to 14.3 ?m. These morphological characteristics were consistent with the description of Neoscytalidium spp. by Phillips et al. (2013). The internal transcribed spacer (ITS) and the large subunit (LSU) of rDNA, and the translation elongation factor 1-? (EF1a) gene for a representative isolate (Mlty_01) were sequenced (GenBank accession Nos. MT041243, MT038898, and MT710710), and comparisons with those of Neoscytalidium novaehollandiae Pavlic, T.I. Burgess & M.J. Wingf. strain WAC12693 (EF585538, EF585551, and EF585576) showed 99–100% nucleotide identity for ITS, LSU, and EF1?, respectively. To confirm the pathogenicity of the isolate, five 2-year-old branches of pear cv. Deveci were wounded by removal of a plug of tissue with a depth of 2-mm and a 5-mm diameter cork borer and inoculated by 5-mm mycelial plugs from one-week-old culture. Sterile mycelial plugs were used as controls. Inoculated branches were immediately transferred to a growth chamber at 24 °C in a 12-h photoperiod. After one-month, necrotic lesions were observed on all inoculated branches, while all controls remained healthy. The fungus was re-isolated from lesions successfully. To our knowledge, this is the first report of shoot blight and canker on pear trees by N. novaehollandiae in Turkey and worldwide (Farr and Rossman 2020).en_US
dc.identifier.citationOksal, E., & Özer, G. (2021). First report of shoot blight and branch canker of Pyrus communis by Neoscytalidium novaehollandiae in Turkey. Journal of Plant Pathology, 103(2), 673-674.en_US
dc.identifier.endpage674en_US
dc.identifier.issn1125-4653en_US
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85100415351en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage673en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12899/565
dc.identifier.volume103en_US
dc.identifier.wosWOS:000613976500001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERONE NEW YORK PLAZA, SUITE 4600 , NEW YORK, NY 10004, UNITED STATESen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPearen_US
dc.subjectNeoscytalidium novaehollandiaeen_US
dc.subjectStem cankeren_US
dc.subjectDiebacken_US
dc.titleFirst report of shoot blight and branch canker of Pyrus communis by Neoscytalidium novaehollandiae in Turkeyen_US
dc.typeArticleen_US

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