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parasitized emerald ash borer

parasitized emerald ash borer

The invasive emerald ash borer (Agrilis planipennis) feeds on ash trees during its larval stages, and the tunnels it bores kills the trees at a high rate. However, a new natural enemy being tested, the parasitoid wasp Spathius galinae, has shown greater success in establishing wild populations and attacking emerald ash borers than any other biological control agents studied thus far. In this image, what appears to be an emerald ash borer larva is in fact mostly Spathius galinae pupae. The parasitoid larvae consumed all of the emerald ash borer tissue except the head capsule before forming their cocoons in the gallery. (Photo credit: Jian Duan, Ph.D., USDA-ARS)

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