Meanwhile, the species has mutated under attack. Now Invicta has learned to create mounds with many queens. The mutant creates vast burrows with millions of workers. The females are the gatherers and they're omnivorous. They go after other insects, crops, even highway expansion joints.
Electric fields draw the ants.
Entomologists are working on two lines of battle. One is chemical. They've given up on insecticides. Now they look for chemicals that miscue the mating process or sterilize the queens. The other attack is not chemical at all.