More than 400 trees at a housing development in Oxfordshire will be burned after they were found to be infected with ash dieback.
The trees at the 1,600-home Kingsmere Village development near Bicester were dug up at the weekend.
Some of the infected saplings were from Lincolnshire, with others imported from Holland. It is the first case of the disease in Oxfordshire.
The Chalara fungus causes dead shoots and lesions on the tree's branches.
Once infected, trees cannot be cured.
A plant health order banning imports and the movement of ash trees came into force on 29 October.
More than 100,000 trees have now been burned across the UK.