Sprinkle leaves and flowers from sage, mints or tansy around the outside of your house or plants that are bothered by ants. These plants can also be used as a living barrier for ant control, bearing in mind that they are invasive in their growth habit and using cuttings from these plants as a barrier is more effective. We grow tansy in an out of the way place to harvest the cuttings.
* Vinegar sprays in and around the hose foundation will repel ants. Keep way from the soil and concrete. Lemon juice concentrate can also be used: mix 50/50 with water and spray.
* Ants will not walk through a line of talcum powder or chalk dust. Diatomaceous earth may also be used as a barrier in and out of the household.
* Using a silica areogel/pyrethrum spray applied to the base of plants like eggplants and peppers can control fire ants from girdling the stems and killing the plants. This is a good barrier as it stays "put."
* Caulk all cracks and crevices in the building to deny them access. Be sure to use high quality pure silicone caulking as these are less likely to shrink or crack once applied.
* Distribute cucumber parings as a repellant. Cucumbers contain a compound known as "trans-2-nonenal" that repels ants as well as cockroaches!
* Try sprinkling some of those instant grits around the nests. See what happens!
* For fire ants: Pour half a cup of Epsom salts into the nest and all around it.
* Sticky barriers like Tanglefoot makes an excellent barrier and can be applied to tree trunks to disrupt the ants from farming of aphids. This will naturally biodegrade itself towards the end of the season. NOTE: On young trees with smaller trunks or those with thin bark (aspens, birches etc.) do not apply directly to the bark surface. Instead use some thin fabric tied around the trunk with the sticky stuff applied over this. Remove at the end of the season.
* On smaller plants a bit of petroleum jelly smeared around the base will stop ants immediately.
What we do in life echoes in eternity.