Finger Imprint of Poncirus trifoliata : A Specific Interaction of a Viroid, a Host, and Irrigation

The unusual symptom, "finger imprint", described exclusively on Poncirus trifoliata, has been reported in only a single field trial investigating the effects of citrus viroids on crop performance. With this, the question has persisted whether the observed growth abnormality was a disease s...

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Veröffentlicht in:Plant disease. - 1997. - 88(2004), 7 vom: 20. Juli, Seite 709-713
1. Verfasser: Vidalakis, G (VerfasserIn)
Weitere Verfasser: Gumpf, D J, Bash, J A, Semancik, J S
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article citrus disease citrus dwarfing
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520 |a The unusual symptom, "finger imprint", described exclusively on Poncirus trifoliata, has been reported in only a single field trial investigating the effects of citrus viroids on crop performance. With this, the question has persisted whether the observed growth abnormality was a disease symptom induced by Citrus viroid IIIb (CVd-IIIb) or a consequence of mechanical damage caused by the handling of young trees during propagation or cultural practices in the field. The recurrence of finger imprint symptoms on trees after 5 years in the field in which no abnormal growth features were previously noted now supports the proposition of a viroid-induced disease. The symptom expression results from an unusual etiology of a complex relationship of the specific viroid CVd-IIIb on the specific rootstock P. trifoliata only when supplemental water is applied by sprinkler irrigation 
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