Dear Juanse
Thanks for this link.

I asume that with our mixture of OA into glycerol or it possible monoxalate formation the acid remain liquid during its movement in the colony thanks to glycerol.

Then, in front of some water OA moves from glycerol to water more easily than from crystals and it burns bees or varroa according concentration and the way. 
Few amount of OA could kill varroa and could dammage bees in below death threshold. Isn't it?

Bees have many chemoreceptors to identify diferent substances in antenae and its complex mouth before eating or drinking something.
Do the parasite varroa have something like that? Or do it depend absolutely from its host? according to its parasitic condition.

In the other hand we both check bee losses in winter using this cardboard strips soaked into a solution of OA/Glycerol. Especially in wet fall and winter.

Joints and legs could be the pathways for the acid to enter the body of the bees when it dissolves in water as the author says regarding varroa.

I think it will be not easy for varroa to become resistant against the flash of H+ of the most powerful organic acid.

Regards
Fernando


===
Fernando Esteban
Cordoba - Arg.

             ***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software.  For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html