The Seattle Times

Don Bartletti / Los Angeles Times

Thursday, August 15, 2013

Citrus growers use predator wasp to fight disease threat

Invasive-species expert Mark Hoddle coaxes a vial of predatory wasps onto the tip of a citrus branch infested with psyllids in Pico Rivera, Calif. The tiny wasp was imported from Pakistan to rub out the psyllids.