How could tobacco smoke possibly be harmful to bees if it's not harmful to
humans?  Or so the tobacco industry says.

As far as testing tobacco smoke or Blackleaf 40 (nicotine sulfate) on bees, I
can think of all kinds of ways of doing it that wouldn't involve putting it in
a honey producing beehive, and still get some results that would indicate
whether or not it killed bees and at what application levels.  Almost anything
you could put in a hive would kill bees or contaminate a hive if you put
enough of it in, even so-called "legal" or "safe" substances.

Has anyone tested all the different toxic chemicals that might be produced
using different smoker fuels and how they might damage bees?

A little common sense goes a long way.

Layne Westover, College Station, Texas