Green campaigners are urging people to be vigilant and help stop the spread of a destructive weed.
Donald Robinson of Bicester with Japanese Knotweed
Bicester Friends of the Earth want people to look out for and report any sightings of Japanese Knotweed.
The weed, which has long, hollow, fleshy stems that can reach three metres long and green heart-shaped leaves, is an aggressive plant that takes over from native flora and can cause major structural damage.
Former warden of Stoke Wood Donald Robinson, pictured with a patch of Knotweed, said for the past few years the weed had appeared along the River Cherwell and on roadside verges. Bicester Town Council had also tackled an outbreak on public land in the town.
Mr Robinson added: "In the Midlands two years ago the weed broke through thick layers of concrete and ruined the foundations and car park just laid for a major supermarket."
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