Last year I lost a hive to SHB. After that I bought an IPK beetle trap from green beehives. It worked so well I bout some more this spring. I have no problems in hives on these bottoms, yet anyway!
I didn't wait for the loss of a colony. I saw the increased numbers of SHB in my hives. I tried beetle blasters and beetle barns. Still saw their numbers increase. Those traps from green bees killed the little buggers quick. I also found that there are areas in the hives and equipment we use that allow SHB to hide from bees. Top feeders are the worst, wooden bound queen excluders and screened innercovers run neck and neck. I am in the process of using human populous (latex caulk) to seal up every nook and cranny I can find.
Have ordered some Beetle Blaster traps for between the frames.
Wolfer I still have a couple of those "Beetle Blasters" and "Beetle Barns" laying around if you want to try them out I'll mail a couple to you free. Send me a PM with a mailing address. They work OK but nothing like the full bottom traps. Also, the bees glue them down. Once while I was getting a Beetle Blaster unstuck it slipped and dumped the oil down into my hive. Killed a SW of the girls could have easily got my queen.
On a side note--What has me up @ 0430hrs is that when I got home last night I checked on my queen rearing Nuc. The SHB have got honey dripping out of the screened bottom board. This is the only equipment I do not have the green bee system on. They don't make them for Nucs. Guess what I get to do today. I gotta win. They have evolution on their side but they got little brains. We aught to be able to come with something to reduce their numbers. After all we learned to control fire.
I've been searching for a good lure for SHB on the internet, found some good info. On trap placement I have read that SHB perfer the shade over direct sunlight. Hives in the sun, traps in the shade.
Sorry about the rant. I'm just really PO'd. Well time for work now.