Usually if you see little holes in all of your hosta it is slug damage, but this year it has been way to dry for slugs. You would think this would be great news for the hosta lovers, but a different pest has decided that hostas are very tasty this year, the cutworm. Cutworms have always been around, but I think the mild winter we had allowed more of them to survive. If your hosta look like this:
Cutworms like all kinds of plants, not just hosta. So even if you are not a hosta lover, you may have seen them eating your veggie or other perennial plants this year. The Wisconsin Farmers are also fighting with the cutworm outbreak.
So what can you do about cutworms? The truth is there is not a lot you can do unless you want to use some harsh chemicals on your plants (and even then most only work on contact). The cutworm are only in the garden from May into early July. Then they turn into small grey colored moths which do not affect your plants. So if you can wait the cycle out, the hosta should be getting their second flush of leaves and you can pick off the most damaged leaves. Some people put cardboard or tinfoil collars around their plants to try to prevent cutworms. You can also go out at night and pick the cutworms off of your plants and dispose of them.