ISHS Acta Horticulturae 472: XVII International Symposium Virus and Virus-Like Diseases of Temperate Fruit Crops
THE VERSATILITY OF PRUNUS TOMENTOSA AS A BIOINDICATOR OF VIRUSES |
| Authors: | V.D. Damsteegt, A.L. Stone, G.I. Mink, W.E. Howell, H.E. Waterworth, L. Levy |
| Abstract:
A repository of graft-transmissible fruit tree virus or virus-like disorders has been established in quarantine containment at the Foreign Disease-Weed Science Research Unit (FDWSRU) in Frederick, MD for the purpose of developing diagnostic detection methodology for each disorder. Isolates from France, Great Britain, Hungary, New Zealand, Turkey, Prosser, WA and Glenn Dale, MD, USA were incorporated into the repository. Budwood of each disorder was grafted into eleven different woody indicators. Most of the indicators under evaluation failed to exhibit any symptoms of any isolate, however, descriptive and/or diagnostic symptoms developed in P. tomentosa (hybrid selection IR473 X IR474) for many disorders not found in the US, including all forms of plum pox (PP), apple chlorotic leaf spot/plum bark split (ACLS/PBS), apricot stone pitting (ASP), cherry Amasya disease (AV), cherry raspleaf-Hungary (CHRL), cherry rusty mottle - European (ERM), false cherry mottle leaf (FCML), Myrobalan latent ringspot (MLRS), and plum mottle leaf (PM). P. tomentosa also exhibited symptoms of several viral diseases found in the US including apricot ring pox (ARP), cherry mottle leaf (CML), cherry necrotic rusty mottle (CNRM), cherry rusty mottle (CRM), cherry twisted leaf (CTL), little cherry (LC), American plum line pattern (PLP), prunus necrotic ringspot (PNRS), prune dwarf (PD), and sour cherry green ring mottle (GRM). P. tomentosa was shown to be useful both as a woody indicator and stock culture plant because it is easily grown and maintained under greenhouse conditions and retains symptoms after repeated severe prunings. | |
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