Thanks guys for the input. I had read the article by Gayle Willliams, but did not take any pictures or
have any additional information to add, except that I have seen it here, at least I think that is
what it is.
I didn't see much info on the daylily leaf miner, so I searched for any on columbine leaf miners.
There is a lot of info about them. Since they overwinter as pupae in the soil, I guess a soil
drench with insecticide early in spring and another in 3-4 weeks might help, plus taking off
affected leaves early in spring as they are seen. Also looking for eggs underneath the leaves
and squishing them. I'm assuming these two types of leaf miners may be similar in habit, or
perhaps in life cycle. Anyway, that's my plan. Actually, I don't remember seeing any when
the plants have first growth, so I'll have to notice when this all begins.
For columbine, this nuisance is not considered harmful to plants, just unsightly.
