Infezioni di <i>Cylindrocarpon obtusisporium</i> su piante di vite in Sicilia
DOI:
https://doi.org/10.5073/vitis.1975.14.36-39Abstract
Da barbatelle dell'ibrido 225 Ruggeri con sviluppo stentato e imbrunimenti del legno, ai quali corrispondevano accumuli di gomma nei vasi dello xilema, provenienti da un vivaio siciliano, è stata isolata una specie fungina identificata come Cylindrocarpon obtusisporium WOLLENW. Inoculando il fungo su talee dello stesso portinnesto è stata riprodotta la sindrome osservata nelle infezioni naturali e dal legno imbrunito si è potuto poi reisolare tale agente patogeno.
Si conclude che i fenomeni di deperimento riscontrati sulle barbatelle di vite in vivaio sono causati da infezioni di C. obtusisporium, specie, a quanto risulta, non ancora segnalata su Vitis.
Infections of Cylindrocarpon obtusisporium on grapevines in Sicily
A decline of rooted cuttings of the grapevine hybrid 225 Ruggeri, caracterized by stunting, black discoloratìon of the wood and gum inclusions of xylem vessels, has been detected in a Sicilian nursery. A species of fungus, namely C. obtusisporium WOLLENW., has been isolated from the affected tissues. By artificial inoculations carried out on cuttings of the same rootstock, the isolate of C. obtusisporium has induced the syndrome observed in naturally occurring infections. The causal agent has been reisolated on an artificial medium from such affected vines. C. obtusisporium, apparently not yet reported on Vitis, seems to be the causal agent of the decline phenomena observed in the nursery.
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