Hi, we have a small wall all around our lawn made up of sleepers laid 3 deep on top of each other. However we have seen wasps entering the gap between the sleepers and there are piles of sawdust on the ground. I can only assume the larvae are eating their way out! Does anyone know how we can stop them from entering please. Many thanks
Hi LW. What i would do is get some silicone sealer from BQ. The stuff they seal outside of windows with. You can get in different colors, dound like the brown would be good for you.
Sounds like they're wood wasps. It's the grubs that are causing the piles of sawdust. I've come across them in wooden window frames and had to replace the affected wood.