Dennis or others:

Is it better to use the crack pipe when they are flying or at home? I am getting ready to try Top Bar Guy's Vaporizer and wanted to know if I should do it on a sunny day when they are flying or in the evening when they are most at home.

I am not sure if the vapors get them on the bees or in the larvae. If on the bees, then maybe better when they are all at home?