Hello Aaron,
Oxalic acid dripping does not affect tracheal mites in a measurable way.  Tracheal mites live inside the tracheae and don't get exposed to the acid. However when mated female mites leave the host and seek a new bee host known as "questing behaviour", it might get exposed to the acid. The effectiveness is not really measurable. It is the same effect for sublimated oxalic acid, oxalic acid fumes crystalize so fast on bee body and does not penetrate the tracheae. It really might require too many applications to get as many mites on the bee body to be effective!!!!!!

Therefore, we don't count much on oxalic acid for tracheal mite control unlike formic acid.

Medhat Nasr

Edmonton Alberta Canada




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