The roots of bracken can damage

The plant has invasive roots which can damage walls and other structures.

Environmentalists say June is the ideal time of year to control it.

The British Trust for Conservation Volunteers, which is helping the Dartmoor Preservation Association (DPA), says the organisation plays a vital role.

Although bracken bashing seems quite destructive, in the longer term it will have a positive impact on the moor Paul Padfield

Spokesman Paul Padfield said: "We can get hold of the volunteers and the DPA provide the work.

"It's fantastic locations and good, worthwhile conservation work.

"It's good for volunteers because they can see they're doing something quite definite.