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ash tree comparison

Two large trees flank a footbridge for a walking and biking trail in a park. The trees, both ash trees, are both 60 feet tall or more (as estimated by the presence of two people facing each other in conversation near the entrance to the bridge between the trees). However, the tree on the left is full of green leaves, while the tree on the right is completely barren.

Large ash trees can be saved from emerald ash borer with timely insecticide treatment. Here, the ash tree on the left received injections of emamectin benzoate, while the tree on the right did not. (Photo originally published in Sadof et al 2023, Journal of Integrated Pest Management)

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