If you are infected with ants in your plants, then you have a serious problem. This is the link of a commercial site that will help in this regard. This site has descriptions and recommendations for control of the more common household ants such as the the: Argentiine Ants Carpenter Ants, Red Fire Ants, Ghost Ants, Odorous House Ants , Pavement Ants and Leaf Cutter Ants.
You will also find links to other entomology sites concerned with ants and a handy link to determine the difference between the termite or the ant.
Unless you can treat the nest directly, spraying is not an effective solution for small ants, unless you use a nonrepellent insecticides or “undetectable” liquid treatments such as Dominion 2L, Termidor or Phantom. Unlike older insecticides, nonrepellent insecticides can’t be smelled, tasted, or even felt by pests. So they crawl through the treated area, not knowing that by ingesting treated materials or merely contacting the insecticide, they’ll die.