CLINTON, Ill. -- The largest ash tree in Illinois is being treated to protect it from the invasive emerald ash borer.
The tree is in the central Illinois community of Clinton. It's a towering 90 feet tall and almost 7 feet in diameter. It's thought to be more than 150 years old, which means it would have been alive at the time of Abraham Lincoln.
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Forestry specialists are set to visit the tree on Monday afternoon and will use a pesticide try to keep the invasive pest at bay. The bug has already killed tens of millions of trees throughout the Midwest.
Clinton's about 40 miles east of Champaign.