Many years ago I worked at a pest control company and we had, among our many pesticides, commercial tobacco juice. So, yes, it is (was) used as a pesticide and you can probably do a Google search and find as much info as you need about what pests and plants it is good for.

There's an interesting thread about lady bugs going right now. If you want organic pest control, you might want to check out that thread.
PharmaCan Reviewed by PharmaCan on . Tabacco Juice I followed this recipe for tabacco juice: Tabacco Juice recipe Take 3 strong ciggeretes soak them over night in water Boil it for 2 to 3 miniutes, let it cool off and spray the plants 3 to 4 times a week. You can add safer soap if you like to the mixture. (make absolutly sure you use gloves/face protection while handling and spraying) Does it really work effectively as a pesticide and is it safe to use on my plants? Rating: 5