Sudden oak death just one of many invasive pest threats to Britain's trees; UK; 3/18/09

Tree trouble ahead Telegraph.co.uk - London,England,UK
By early 2002, Phytophthora ramorum had arrived in nurseries and gardens in southern England. This was frightening, particularly for ''heritage'' garden owners, and especially those in wet areas of the south and west of Britain, since it soon became clear the disease was a pathogen most easily spread in wind-driven rain. There were predictions of important historic gardens on acid soils laid waste, filled with blasted, browning, wilting shrubs and trees or, worse still, barren of plants that had graced them for a century or more.