Posted: 27/08/2016 at 14:26
Well, it becomes needful for someone to do it. I found an adult in my Alpine house last night walking all over the collection of Saxifrages (along with half a dozen slugs).
There is a possibility that a compost will be on sale soon which contains a fungus which attacks and kills the larva. It is already available in the Netherlands. The fungus itself is available to Nursery persons here, but how many use it I do not know.