Re: Tobacco smoke for monitoring mites.
Just purely out of interest I grew some tobacco plants last year to use in the bee smoker. Turns out it is very easy to grow & I got a good crop, lots of dried tobacco leaves stored in the basement now.
Using it was a disappointment though. I mix a leaf or two in with the other smoker fuel but found it is quite repellent to the bees, they run away from it and also are more aggressive than if just normal smoke is used.
Mites? tried smoking heavily then checking a few bottom boards, couldn't really find any noteworthy numbers of fallen mites.
One use I have found for the tobacco is package making. One of my methods is to put a queen excluder on the hive and a box of empty comb, then smoke in the entrance so the bees go up, then shake the bees from the box of empty comb into packages. Found that this is a lot more effective if there is tobacco in the smoker, once again, likely because of the repellent nature of it.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).