Bill Hesbach posted a link to this paper on Bee-L yesterday. The research, conducted over a six year period of time, shows that spraying your hive with 100% cow urine can completely cure a hive of EFB and promote better overall hive health. Uh, anyone willing to give it a field trial here in the US? Squarepeg?
https://www.asianagrihistory.org/pdf/volume19/ruchira-tiwari.pdf
https://www.asianagrihistory.org/pdf/volume19/ruchira-tiwari.pdf