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Entomologist Brenton Teillon studied a branch infected with the woolly adelgid at Purgatory Chasm in Sutton.
The 45th Parallel | Warming where we live

As N.E. warms, tiny pests take root

Insect's assault on trees growing

By Beth Daley
Globe Staff / June 10, 2007

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The woolly adelgid is turning Hemlock Hill in Boston's Arnold Arboretum into a hemlock graveyard. (Full article: 1578 words)

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