Leaf necrosis and twig dieback of sweet persimmon (Dyospiros kaki L.) caused by Pseudomonas syringae pv. syringae in Italy |
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Authors: | M. Scortichini D. D'Ascenzo Daniela Di Silvestro |
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Affiliation: | (1) Istituto Sperimentale per la Frutticoltura Via di, Fioranello 52, I-00040 Ciampino Aeroporto, Roma, Italy;(2) Istituto Sperimentale per le Patologia Vegetale, Via C.G. Bertero, 22, I-00156 Roma, Italy;(3) Regione Abruzzo, Servizio Fitosanitario Regionale, Viale Riviera, 81, I-65100 Pescara, Italy |
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Abstract: | In spring 1996, extensive leaf necrosis and twig dieback were observed on young sweet persimmon (Dyospiros kaki L.) trees, cultivars O'Gosho, Hachija, Mercatelli and Kaki-tipo planted in the Abruzzo region (central Italy). Many trees were killed. When the dieback reached the trunk, in many cases, new vegetation was noticed above the graft point. The cultivar Jiro-C was not affected by the disease. During 1997, no symptoms were observed on any plant. The orchard was planted in a clay soil with a very low content of organic matter. Biochemical, nutritional and pathogenicity tests indicated Pseudomonas syringae pv. syringae van Hall as the causal agent of the disease. This is the first report of this bacterium as a pathogen of sweet persimmon in Europe. |
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Keywords: | Pseudomonas syringae pv. syringae sweet persimmon Italy |
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