> it doesnt seem there is much research on sublimation and open brood mortality.

Pretty good bet that's because it is not a burning question (oof). As you and I discussed, a real study would involve treatment AND control hives, would measure square inches of brood at intervals, would incorporate a dead bee trap*, would track survival rate. In the end, if survival is enhanced by OA treatment, some side effects would therefore be acceptable. 

Peter L Borst

* Gary, N. E. (1960). A trap to quantitatively recover dead and abnormal honey bees from the hive. Journal of Economic Entomology, 53(5), 782-785. excerpt: New methods for intrahive testing of insecticide toxicity to honey bees and evaluation of adult bee diseases are made possible by the use of the trap.

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