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Westonbirt researchers always on the look out

The curator of Westonbirt Arboretum in Gloucestershire says that there can be a threat to trees from overseas species.

"There are things that we don't yet have like the Asian longhorn beetle, we have things in America for instance, the Emerald Ash borer, that's responsible for probably killing 100 million trees over there, ash trees native in the woodlands and forests. So we really need to be on our toes, we need to be aware of what's going on, and this research is very much part of that work."

– Mark Ballard, Curator of Westonbirt Arboretum
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