Thank you for the tips. I had assumed it was mice doing the damage as the
damage never reaches more than around 6 inches from ground level and the
teeth marks are tiny. From the forestresearch website it would point more
towards Voles. Someone I spoke to suggested tarring the stems but I think it
may only have been a stab in the dark.

"Kaz" wrote in message
news
Does anyone have an effective method of preventing mice from ring-barking
saplings? I have just lost several dozen potted Acers, Willows and fruit
trees (and last winter and the winter before!). Any ideas gratefully
received.
Christina