It looks like mites. I just discovered mites killing mine this year and my leaves looked like that. I bought an organic spray but my plants, like yours, are too big now. I'll use the spray next year when the plants are small. I've been successful with simple hard cold water showers with a hose and mercilessly pruning anything infected. Clip any branch that has curled leaves. Check the backside of a fresh green set of curled leaves and look very closely. The way your tomoatoes look in those pictures they should be crawling all over and fast. I can see them with my naked eyes but some people need a magnifying glass. It took me three weeks of heavy pruning and water showers and I kind of have them under control but not completely. I still check every single day and find them albeit far slower and in far less quantities. Sometimes I'd prune a branch and a big spider would jump out at me. The link below shows my despair last year at this date when all my tomatoes were in a death spiral because of mites (but I didn't figure this out until July 2012). Here is a link that might be useful: Last year's tomato failure

Farmgardener, Thanks for the kind words. I have to confess that I had released ladybugs for years before I finally figured out what the larvae looked like....and then it was only because I saw these peculiar gray alligator-shaped things and wanted to know what they were. Much 'googling' later, I knew they were ladybug larvae. Okiefamily, You know, the larvae are actually cuter than they appear in that photo. Most of the ones I see are a lighter gray with some pale orange splotches. If I can google and find a photo of some that look like that, I will link it below. They do look really, really odd as they get older and begin to look more like actual lady bugs. Dawn Here is a link that might be useful:

Jennifer —-(Spraying with Neem Oil and or and other mixtures to eradicate the insects organically could still harm those beneficial insects. Some people will just let those pest stay on the tree because they dont want to harm them. Its a difficlt choice to make for some and you need to understand that some bad infestations that might get out of hand and could cause your trees to become weak and allow other diseses to slowly kill your tree. i always try and let Mother Nature work on the right balance of the pest verses the beneficial insets to keep everything in check. But sometimes i will have to step in and use more than organic to combact the problem. its up to you to decide what is best for your tree. Laura Even those that eat leaves ___ Katydids 🌺

If you check out the Flora of North America key here, you'll see that Hypericum is sorted into sections, then keyed per features that are sometimes only visible under magnification. It isn't likely that you can provide enough details via photos and descriptions to get accurate Hypericum IDs from this site, unless your plants are one of the more readily identifiable forms. If you want to determine species, check if local colleges have botany departments. They may be willing to help. If that doesn't work, see if they will provide contact info for one of their better students. This is really a tricky genus, when trying to ID plants from photos.