OAV is not just a late summer or fall/winter treatment. It is also an outstanding spring treatment. Getting a package or catching a swarm? OAV them!
For a package, I like to vaporize the package by placing it under a cardboard box, vaporizing with a ˝ gram of OA and hiving the next day. You can also hive them then vaporize when you see eggs/larvae.
As for swarms (which is really nothing more than a package that’s been hived), I vaporize them once I see eggs/larvae.
OAV’ing packages and swarms assures that you have almost a mite free hive when starting!! Vaporizing at this time should carry you over till your late summer treatment.
If you don’t have a vaporizer, check out all the great vaporizers and OxaVap.com!