In my ongoing battle with the wasps I’m going to try this thing. It claims to “create a large wasp-free zone without killing wasps and without disturbing the insect world in your garden. No mess or chemicals to clear up, no dead wasps, no maintenance and no wasps. Based on an old age remedy Waspinator repels wasps by mimicking an enemy nest.”
I’ve hung it in the greenhouse, having first removed the nest that the wasps were starting to build. We’ll see how it goes and I’ll keep you updated.