Re: oxalic acid vaporizer vs formic acid treatment for varroa
FWIW formic can be even cheaper than oxalic if one purchases it and mixes their own. I do this and it is pennies when used with a "meat pad". Male varroa that are under the cappings are killed and I've found formic to be extremely effective with no measurable queen loss. This is just my own experience.
I think alcohol wash is the way to go as far as testing. Don't be concerned about killing the bees because you are doing this to save the bee YARD..
Personally I treat without testing because I feel that varroa are in all hives where varroa is able to survive.
"Challenger" as in the Mopar muscle car. Not a personality description .
Keeping bees to raise money for chordoma.