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Colle di Val d'Elsa, Italy

Zaccardelli M.,Centro Of Ricerca Per L Orticoltura | Campanile F.,Centro Of Ricerca Per L Orticoltura | Villecco D.,Centro Of Ricerca Per L Orticoltura | Parisi M.,Centro Of Ricerca Per L Orticoltura
Acta Horticulturae | Year: 2011

Causal agent of bacterial spot of tomato is Xanthomonas vesicatoria, some years ago reclassified in four species: X. euvesicatoria, X. vesicatoria, X. perforans and X. gardneri. Xanthomonas-like isolates recovered from diseased tomato fruits, collected in a field in southern Italy in 2009, were identified by biochemical and phytopathological tests. All the isolates were able to hydrolyze starch, esculin and Tween 80; moreover, gave HR on bean pod and symptoms of bacterial leaf spot on tomato plantlets. Therefore, Xanthomonas-like isolates belonged to the old phytopathogenic bacteria Xanthomonas axonopodis pv. vesicatoria/X. vesicatoria. MLST analyses confirmed results of biological and biochemical tests. Differences in disease severity were observed on the different tomato genotypes cultivated in open field. Among 11 paste cultivars, the highest incidence of diseased fruits was on 'Kalvert' and 'Tiziano', whereas the lowest incidence was on 'AB8065' and 'Perfectpeel'. Among 11 cultivars for peeling, the highest incidence was on 'Docet' and 'Scipio', whereas the lowest was on 'Player' and 'Gades'. No symptoms were observed on tomato fruits of 'Allflesh 905'.

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