Reduce slug populations with thorough spring and fall cleanups to remove hiding places and slug egg masses attached to leaf litter and other garden debris. There are many home remedies for slug control. All work to some degree but, without altering the environment, it becomes an endless proposition. Effective chemical baits are available but should be used as a last resort. In wooded areas deer may be a problem.
Deer often eat hosta foliage when food is scarce.
It has been noted that they have favorites, so if deer persist, try planting a different hosta. Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.