I don't know how well they can climb back into a hive, but falling onto a dry IPM board or dry oil tray does not kill them. I've found them on dry trays and they are still crawling around. They move surprisingly fast, too.
They don't seem to be able to climb on slick plastic, although probably can on a porous surface such as wood or block.
Dropping them onto an IPM board (or just a corrugated plastic board from a sign), generously sprayed with veggie oil spray and placed under the screen, is fatal for them, and for SHB as well. This is cheap, easily cleaned off, and gives you your mite drop count.
They don't seem to be able to climb on slick plastic, although probably can on a porous surface such as wood or block.
Dropping them onto an IPM board (or just a corrugated plastic board from a sign), generously sprayed with veggie oil spray and placed under the screen, is fatal for them, and for SHB as well. This is cheap, easily cleaned off, and gives you your mite drop count.