Hello All
Garrett Martin asks about Oxalic acid.
If you go to the following website you can download an excellent booklet
from New Zealand which gives (IMHO) excellent information on all varroa
treatments including oxalic acid.
http://www.maf.govt.nz/biosecurity/pests-diseases/animals/varroa/control-of-
varroa-guide.pdf
Sincerely
Tom Barrett
Dublin
Ireland