EPPO Global Database

EPPO Reporting Service no. 05 - 1992 Num. article: 1992/07

Movement of viral - like RNA in colonies of Cryphonectria parasitica.

The occurrence of viral - like Double stranded RNA in Cryphonectria parasitica (EPPO A2 organism) which is responsible for the hypovirulence of certain C. parasitica strains has been studied in Utah, USA. It was found that the dsRNA moved from a hypovirulent strain to a virulent strain (in adjacent agar colonies) at a rate of 16 mm per 24 hours. This was 3-4 times faster than the colony growth rate during the same period.


Martin, R.M.; Van Alfen, N.K. (1991) The movement of viral - like RNA between colonies of Cryphonectria parasitica.
Molecular Plant - Microbe Interactions 4, 507-511.