Are imported fire ants problem pests in their homelands, Brazil and Argentina?
Fire ants of the species S. invicta and its closely-related species of ants are not generally viewed as important pests in Brazil and Argentina. Occasional local outbreaks, which could result from temporary escape from normal controls due to habitat disruptions, have been reported in recently settled towns in the Amazon region. It is safe to say that fire ants native to South America are no more pests there than are native fire ants pests in North America.