Etiology of Botryosphaeria Panicle and Shoot Blight of Pistachio (Pistacia vera) Caused by Botryosphaeriaceae in Italy

Pistachio (Pistacia vera) is an important crop in Italy, traditionally cultivated in Sicily (southern Italy) for several decades now. In recent years, new orchards have been planted in new areas of the island. Field surveys conducted in 2019 revealed the presence of symptomatic trees showing shoot d...

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Veröffentlicht in:Plant disease. - 1997. - 106(2022), 4 vom: 23. Apr., Seite 1192-1202
1. Verfasser: Gusella, Giorgio (VerfasserIn)
Weitere Verfasser: Lawrence, Daniel P, Aiello, Dalia, Luo, Yong, Polizzi, Giancarlo, Michailides, Themis J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Botryosphaeriaceae blight canker phylogenetic analysis pistachio
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520 |a Pistachio (Pistacia vera) is an important crop in Italy, traditionally cultivated in Sicily (southern Italy) for several decades now. In recent years, new orchards have been planted in new areas of the island. Field surveys conducted in 2019 revealed the presence of symptomatic trees showing shoot dieback, cankers, fruit spots, and leaf lesions. Isolations from symptomatic samples consistently yielded fungal species in the Botryosphaeriaceae family. Identification of collected isolates was conducted using morphological and molecular analyses. Morphological characterization was based on conidia measurements of representative isolates and also effects of temperatures on mycelial growth was evaluated. DNA data derived from sequencing the ITS, tef1-α, and tub2 gene regions were analyzed via phylogenetic analyses (maximum parsimony and maximum likelihood). Results of the analyses confirmed the identity of Botryosphaeria dothidea, Neofusicoccum hellenicum, and N. mediterraneum. Pathogenicity tests were conducted on detached twigs and in the fields both on shoots as well as on fruit clusters using the mycelial plug technique. The inoculation experiments revealed that among the Botryosphaeriaceae species identified in this study N. hellenicum (occasionally detected) and N. mediterraneum were the most aggressive based on lesion length on shoots and fruits. N. mediterraneum was the most widespread among the orchards while B. dothidea can be considered a minor pathogen involved in this complex disease of pistachio. Moreover, to our knowledge, this is the first report of N. hellenicum in Italy 
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650 4 |a phylogenetic analysis 
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700 1 |a Lawrence, Daniel P  |e verfasserin  |4 aut 
700 1 |a Aiello, Dalia  |e verfasserin  |4 aut 
700 1 |a Luo, Yong  |e verfasserin  |4 aut 
700 1 |a Polizzi, Giancarlo  |e verfasserin  |4 aut 
700 1 |a Michailides, Themis J  |e verfasserin  |4 aut 
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