First report of Sphaeropsis sapinea on Scots pine ( Pinus sylvestris) and Austrian pine ( P. nigra) in Sweden

Oliva, J. and Boberg, J. and Stenlid, J. (2013) First report of Sphaeropsis sapinea on Scots pine ( Pinus sylvestris) and Austrian pine ( P. nigra) in Sweden. New Disease Reports, 27. p. 23. ISSN 2044-0588

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Abstract

In January 2013, an infected Pinus sylvestris cone was detected in Fjallnora (central Sweden). The cone displayed abundant pycnidia on the scales. Conidia were dark-brown, subglobose, mostly non-septate, although septate and even triseptate conidia were observed. These characteristics matched well with those reported for Sphaeropsis sapinea (syn. Diplodia pinea). Cultures on MEA were initially white with profuse aerial mycelia that after one week turned grey to blackish. DNA was extracted from cultures and scales, and amplified by PCR using specific primers of both D. pinea and D. scrobiculata. Only the D. pinea primers gave positive results amplifying a product of 700 bp in all cases. S. sapinea was later also found causing tip blight on three Austrian pines ( P. nigra) in Alnarp (southern Sweden), as well as infection on cone scales. Isolations showed the same morphological characters while PCR revealed the same diagnostic 700 bp band as the samples retrieved from P. sylvestris. This is thought to be the first report of S. sapinea affecting forest pines in Sweden.

Item Type: Article
Language: English
Future Forest Subject: Skogsbruk i klimatförändringens tid > Osäkerhet och risk
Depositing User: Christer Enkvist
Date Deposited: 28 Feb 2017 14:24
Last Modified: 28 Feb 2017 14:24
URI: https://ffpdb.slu.se/id/eprint/3818

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