Natural Enemy of Spotted-wing Drosophila Found in United States

Researchers with Washington State University have confirmed discovery in the United States of a parasitoid wasp that is the natural enemy of the fruit-damaging spotted-wing drosophila (SWD) fly. The wasp, Ganaspis brasiliensis, is native to South Korea and is a host-specific parasite of spotted-wing drosophila larvae. The Ganaspis parasitoids were recently approved by the U.S. Department of Agriculture Animal and Plant Health Inspection Service to be reared and distributed around the United States as a biocontrol, but before that could happen, the species apparently made its way into Washington on its own. This means that distribution of the species around the state will not be regulated or limited by USDA.