The stingless wasp is tiny – about the size of a mosquito. But scientists have big hopes for it. In Russian forests, where the wasp is originally from, it naturally targets and attacks emerald ash borer.
Research Entomologist Jian Duan cuts away bark from ash trees in search of emerald ash borers, an invasive species that has been killing off the trees. They're looking particularly for those affected by a parasitic wasp released into the area to combat the EABs. For Jian Duan, the answer is simple: follow the dead ash trees.
But today Duan isn’t just collecting emerald ash borers. He’s also looking for its predator, one released here on purpose in 2019 and 2020: a wasp known as spathius galinae . Solutions like this, known as biological control, are one way scientists can deal with biological problems like the invasive emerald ash borer. Right now there are experiments across New England to see if the wasps can help save the region’s ash trees.
Since it was first detected in Michigan in 2002, emerald ash borer has killed tens of millions of ash trees. Federal officials estimate it has cost municipalities, nursery operators and the forest-product industryDuan said the idea of biocontrol is to find the natural predators of an introduced pest and bring them to the new environment to slow the pest’s spread.Shortly after EAB arrived in the U.S., DNA testing traced its origin to northeast Asia.
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