If you only have a few beetles hand picking early will do the trick. Last year I pulled 36 beetles in one day off of a single plant of L. Siberica. So I went to Neem. Neem dries up all of the larvae (you have to get the underside of the leaves) and it tends to repel the adults. You have to repeat the treatment at least once after 7-10 days to get those larvae that recently hatched. The Neem treatment saved that L. Siberica from being totally stripped of its leaves.
Steve
