Depends. Ants hate fungus and bacteria, so molasses and other fermentables mess with their vibe and you can put it on the ground. You can soak crushed tomato leaves in a little water and make a nightshade spray. 20 mule team borax from the laundry can be mixed with sugar, making a bait. (danger- use a plate) Colored paper sprayed with stickum to make traps works. It does depend on the bug though. Personally I just use spinosad and bT mostly. A little goes a long way.