The European Agency for the Evaluation of Medicinal products published the below article, which is the most comprehensive overview of Oxalic acid that I'm aware of: https://www.ema.europa.eu/en/documents/mrl-report/oxalic-acid-summary-report-committee-veterinary-medicinal-products_en.pdf I'd recommend reviewing this document with regards to making conclusions about the use of oxalic acid in honey bee hives. -Alex *********************************************** 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