Dieback and trunk canker symptoms were observed on centenarian plane trees (Platanus orientalis) in Gezi Park and Dolmabahçe Avenue in İstanbul province of Turkey in August 2015. Reddish‐brown canker lesions covered approximately half of the tree trunk, from roots to top of the trees. The external symptoms were chlorosis, defoliation and dieback, and most of the affected trees were leafless. Three fungal species were isolated from necrotic root and stem tissues and identified as Botryosphaeria parva (Anamorph Neofusicoccum parvum), Neopestalotiopsis clavispora and Diaporthe foeniculina (Anamorph Phomopsis theicola) by morphological characteristics and sequencing of the internal transcribed spacer (ITS) and the β‐tubulin (β‐tub) gene regions. Inoculations on two‐year‐old P. orientalis seedlings demonstrated that all three species were pathogenic, but B. parva caused the largest lesions on stems of plane seedlings. Dual inoculations did not show any synergism in pathogenicity. This paper is the first report of B. parva, N. clavispora and D. foeniculina causing root rot and stem canker of plane trees in Turkey, and probably worldwide.

中文翻译：

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土耳其伊斯坦布尔的Botryosphaeria parva（Anamorph Neofusicoccum parvum）在梧桐树（Platanus Orientalis）衰退中的潜在作用

2015年8月，在土耳其伊斯坦布尔市的Gezi公园和Dolmabahçe大道上的百岁老人梧桐树（Platanus Orientalis）上观察到死皮和树干溃疡的症状。从树根到树顶，红褐色的溃疡病覆盖了树干的大约一半。 。外部症状是萎黄，落叶和枯死，并且大部分受影响的树木没有叶子。从坏死的根和茎组织中分离出三种真菌，并鉴定为细小葡萄孢（Botryosphaeria parva，Anamorph Neofusicoccum parvum），新孢子虫（Neopestalotiopsis clavispora）和Diaporthe foeniculina（Diaporthe foeniculina）（Anamorph Phomopsis theicola）。）通过内部转录间隔区（ITS）和β-微管蛋白（β-tub）基因区域的形态特征和测序。两个岁接种侧柏苗表明，所有三个品种分别为致病性，但B.麦穗鱼造成最大损害的平面苗茎。双重接种在致病性方面未显示任何协同作用。本文是B. parva，N。clavispora和D. foeniculina在土耳其乃至世界范围内引起梧桐根腐烂和茎枯病的首次报道。