We have a lavender hedge and occasionally one bush will die for no apparent reason whilst the others around it carry on growing. I'll check them again, but have never noticed any beetles.
We found the best type is Hidcote, it is upright and stays neat and tidy. We bought another 12 Hidcote bushes and planted them but they have turned out to be another type altogether, sprawling and untidy.
Thought this might amuse some of you!

