voa news - Steve Baragona

Scientists are pitting insects against insects in a battle to control an invasive species.

U.S. Department of Agriculture researchers have released tiny parasitic wasps in forests in Maryland to attack the emerald ash borer, an invader from China that is devastating forests across the northern United States.

By the end of this decade, this insect will have done an estimated $10 billion of damage nationwide, according to one study.