Two species of fire ants are found in Florida. Most notorious is Solenopsis invicta Buren, the red imported fire ant (RIFA), followed by the much less common Solenopsis geminata (Fabricius), the tropical or native fire ant.
Leaf curl is a plant disease characterized by curling of leaves, and caused by a fungus, genus Taphrina, or virus, especially genus Begomovirus of the family Geminiviridae.
Curling or rolling of tomato leaves can be caused by various factors including environmental stresses, viral infection and herbicide damage. To determine which factor is the culprit, it pays to take a close look at the plant(s).