I would like to know of beekeeper's experiences using oxalic acid vaporization with daily high temperature above 105 F degrees. Or, please share your maximum temperature experience using OAV and whether you had any problem with bee kill/damage. I don't want to kill my bees.
I plan to treat for Varroa soon. Too hot for formic or thymol (>105F). Two weeks ago my hives averaged 5.8% varroa infestation from alcohol washes on 300-bee samples from brood frames. Everything happens early here in Phoenix. Hives started making brood in January and honey flow started March 5 and pretty much ended early May. Honey supers are off. Brood rearing continues in double deeps from light (maintenance) flow of nectar and pollen; hives have an average of about 4 frames of brood so I expect Varroa to multiply rapidly. I see scant sign of deformed wing virus in 1 of 12 hives. Thanks.