I noticed in Bee Bop's pictures on another thread that he has roofing shingles under the hives. Does this help a lot with control of shb? I put landscaping fabric just under my hives and covered it with pebbles so I can level them, it doesn't seem to be effecting the nasty little critters. Any other tips?
What you put under your hive will have no effect on adults, as they FLY. I had seen them take flight to escape my mashing them, but they also fly in also. I stood out side my hive last night and watched at least 6 or 7 fly in and land on the hive to enter it. They pupate in the ground, so you can treat the soil around the hive with Gardstar to kill the larvae and pupae in the soil. W.T. Kelley sells it.