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Subject: Phytophthora ramorum found for the first time on oak in Europe
Date posted: November 07, 2003
Source: Department for Environment, Food and Rural Affairs (DEFRA)
Phytophthora ramorum, the pathogen associated with sudden oak death, is suspected to have been present in Europe since 1993 on rhododendron and viburnum, though the causal pathogen was not identified until 2001. On November 5, 2003, the UK confirmed the first case of P. ramorumon one Southern red oak tree (Quercus falcata) that was growing in the vicinity of where rhododendrons had previously been infected with P. ramorum. English oaks, or white oaks, are growing near the infected tree, but show no signs of infection. Southern red oaks are planted infrequently in Europe, primarily as specimen trees. Preliminary research from the Forestry Commission’s Plant Health Service suggests that red oaks tend to be more susceptible to P. ramorum than white oaks.

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