Charlotte has a long history of battling these black and orange caterpillars on oak trees. They start off as little green worms. Their numbers are low now, but they'll be back.
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Don't let their pretty metallic green color fool you. Once these menaces bore under the bark of an ash tree, it's too late to save the tree. But you can save your ash if you act soon enough.
There's a new threat in town. The Asian longhorned beetle and the spotted lanternfly have a taste for Charlotte's native trees. These non-native pests are bad news for trees.