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.
Duan 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. Duan traveled to Russia – trekking through cold forests to collect wasps that only prey on EAB. Samples were brought to America, quarantined and carefully tested for years to ensure the wasps wouldn’t kill any other non-target species.
As Duan and his assistant peel more bark and pull more larvae from the dying tree in Connecticut, they still can’t find the Russian wasp or two other species that were introduced here. So they decide to cut down the tree to study it further.Rutledge said it’s too late for the wasp to stop the massive wave of EAB that’s killing older ash trees. But there is hope for the younger trees that are just starting to grow.
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