Posted: 13/05/2012 at 18:04
The webs may be from moth caterpillars - they are very well camouflaged, which is why you won't have seen them. They will eventually kill the parts of the shrub that they keep festooning with webs.
There's no organic control, I'm afraid - only an insecticide such as Provado Ultimate Bug Killer will get rid of them. As long as the plant isn't flowering for six weeks afterwards, it won't affect bees.