No, I guess I hoped that Marion did. We do know that talc is so fine as to be a problem. On the other hand, the chalk used by carpenter's is a handy way of temporarily marking bees, and it stays more on the surface of the hairs. We did experiments this summer using chalk as a carrier. In caged bees, after 3 days, there was no mortality from the chalk.
Did you ever look at Beekeeper induced "dust" in the form of sugar dusting
for Varroa and its effect on bees?
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