> The problem with OA from the research I have done is keeping the hive below >varroa threshold until the broodless period. Exactly, Bob. Which is where breeding comes in. The VSH (SMR) bees keep the mite levels down to a level where the colony will reach the broodless period, without crashing. The colony can then be treated with OA, cleaning up most of the rest of the mites. Mike -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.14.17/553 - Release Date: 11/27/2006 -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---