This morning I applied Heterorhabditis indica nematodes purchased from Southeastern Insectaries in a watering can around my hives. It'll be interesting to see if they combat the SHB life cycle.
FYI -
The actual nematodes come shipped in a Styrofoam cooler and they are suspended with that gel you put in flower pots to provide moisture storage. In the bag below there are about 5 million of the nematodes that specifically attack the SHB. I had some difficulty in actually counting them to make sure I wasn't ripped off.