There have been more than 15 cases of Ash dieback in the region in recent years.
But this outbreak at Bickleigh near Tiverton is the first time the disease has spread from an infected tree to previously healthy indigenous trees.
More top news
Thousands of sea-food lovers descended on Falmouth for this year's Oyster Festival which marks the beginning of the oyster dredging season.
The driver of a speedboat which capsized in Devon, trapping a teenager who drowned ‘was not wearing the emergency kill cord’, a report says
The Thursday morning weather with Bob Crampton