This site best viewed with 800X600 resolution with and full screen AHS Disclaimer Statement Hosta Pest and Disease Control Hostas are easy to grow and usually less subject pests and diseases than other perennials. However, like all plants, even Hostas are host to some pests and diseases which are worth noting. Most are easy to prevent or safe and simple to treat - a few are more serious.
None are unique to Hosta and most are much more serious in other plant species.
Slugs have been around for eons. Not all slugs are bad slugs though. Some only eat decaying matter and would not feed on a living hosta leaf if its life depended on it. A few types are carnivorous and will feed on other slugs. The slugs we worry about are the ones that feed on our hostas and other plants.