Biology: Instant Mosquito Control

The rice fields of California's Sacramento Valley are flooded every year from spring to fall. For five months, they are perfect breeding grounds for vast swarms of mosquitoes that have largely become resistant to chemical insecticides. For all their immunity to man-made controls, though, the insects may yet meet their match — all because an imaginative University of California scientist has gone back to nature and enlisted the aid of a voracious and prolific South American fish.

Entomologist Ernest Bay has pinned his hopes on the little Cynolebias bellottii, or Argentine pearlfish....

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