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.
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.