Cockroaches have many natural predators, including toads, frogs, beetles, geckos and iguanas. Some parasitic wasp species will target cockroaches as well. These species lay their eggs inside the egg cases of cockroaches; hatchlings feed upon nearby cockroach eggs. Entomopathogenic fungi have also been identified as lethal to roaches, as their spores attach to insects and kill them within weeks. Cockroaches affected by fungi then pass the parasite on to other cockroaches.
Contact a pest control professional to select the most effective methods of pest control.