He explains that biological control is the use of other organisms, not themselves harmful, to check the breeding of one that does cause harm, such as the strategy adopted in Vietnam.

The following are some of the chief forms biological control could take:

Fish: The Chinese have used many species of fish to prevent the growth of A. aegypti · Tadpoles: The tadpoles of the Cuban tree frog have been found an effect check against all kind of insects and algae growing in water·

Zooprophylactics: Animals that attract mosquitoes, and thereby keep them off humans. Some scientists have found that a kind of mosquito common in Hawaii prefers cats to humans.

Predators: The Culex, Psorophora, and Toxorhynchitis species of mosquito sparked interest as their larvae feed on the larvae of A. aegypti.