Oak skeletonizer
50 host plants
Last updated
You will see groups of small caterpillars feeding on oak leaf tissue while leaving veins and midribs intact, creating a skeletal appearance. Damage begins on lower canopy leaves and progresses upward. Larvae are dark with lighter stripes and feed in groups. Multiple overlapping generations create defoliation from midsummer through fall. Heavily infested branches become completely defoliated by late summer.
Prune severely defoliated branches to improve tree appearance and remove pest habitat. Encourage natural enemies including parasitic wasps and predatory insects. If populations exceed tolerances, apply targeted sprays when larvae are young and clustered. Avoid broad-spectrum insecticides. Maintain tree vigor.