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.
If the leaves of your tomato plants are twisted or curled, the problem could be environmental, chemical or even biological. There are five primary reasons that tomato leaves twist or curl. These are wind damage, herbicide drift, herbicide residue, broad mite and tomato viruses.