PlantFiles is getting a new look! Just in time for spring, we're rolling out a new look for the best online plants database. It will also work with your smart phones and mobile devices, so now you can take it with you on garden center visits or botanical garden tours. Questions or comments? Please post them here.
Does look like leaf rollers. Easy enough to determine--unroll a leaf and, if that's the problem, you will see them. I always clip off any affected leaves and spray the rest of the plant with an insecticide. Just to be on the safe side, I take all the leaves I clip off and put them in a Zip Lock bag before I throw them in the trash.
I don't know of anything that causes that besides the leafrollers--did you just look at one leaf or did you look at a bunch of them Could be a few of the rolled leaves have been abandoned. I'm also not sure if they stay in the leaves all the time or if there's a certain time of day that you need to look. Try googling leaf rollers or leaf roller caterpillars, I'm sure there's a lot of info out there about them.