08/08/2026
We've been seeing quite a few of these caterpillars around town in the last few days so we are reposting this from a couple years ago.
We've received a couple questions about black and yellow/orange striped caterpillars defoliating red oak trees. These are caterpillars of the orangestriped oakworm (Anisota senatoria), a rather handsome native moth. The caterpillars are active in late summer and early fall and feed on red oaks, especially pin oaks. They can hit individual trees pretty hard, but normally do not cause severe long-term damage. By the time we notice their defoliation, they've probably already done most of their damage and control efforts may not be worthwhile. They also seem to be somewhat periodic and do not seem to hit the same trees hard in consecutive years.
https://treescharlotte.org/tree-care-tips/meet-the-orange-striped-oakworm/