Margined Blister Beetle

This nasty little bugger looks innocent enough, but don't be fooled! Something had been stripping my sweet autumn clematis bare to the stems every year, just as it was about to bloom. When I finally found out the culprit, I began looking for them. The ones I have here in NC - between Asheville and Charlotte - are the "margined" ones. Didn't seem to bother with any other plants, just the SAC's. No wonder - I've got a lot of these vines (or HAD a lot). But today I caught two of them munching away on my ligularia. All I had was some Sevin dust - don't know it it'll work or not. Rain now, but tomorrow I'm going on a hunt. Does anyone know what's effective against them, other than harsh insecticides?

this is a bad bug , in alfalfa it only takes a couple to kill livestock mainly horses. It will also cause blisters to your skin if they are startled. If hand picking wear gloves. But I don't think that's possible they keep showing up, lime and all purpose flour mixed together is one recipe I read to control the little buggers. Gardens alive has something for them too. I'm sure the local garden center has a dust or spray.