Your chewing tobacco concoction is absolutely NOT harmless to anything except pests.
It's a nicotinoid (sp?), a nicotine-based poison, and is lethal to almost everything, especially honeybees.
It is suspected to be one of the chief reasons for honeybees disappearing, due to the neurological damage it does. The current theory is that the honeybees get damaged to the extent that they cannot 'remember' where they live, and just fly around until they die.
Please stop using it.