Hosts: all fruit trees
Biology: The adults are very hard, rounded beetles with pronounced “snouts,” and are primarily active at night. Adults feed on foliage and the small, white legless larvae feed on roots and crowns.
Symptoms: Semi-circular notches at leaf edges.
Monitoring: Check for leaf damage in summer.
Treatment Threshold: No threshold determined.
Degree Day Model: None
Management Considerations: The best timing for suppression is in the spring and early summer when leaf-notching injury first appears, and again in the late summer to early fall to target larvae before winter. Entomopathogenic nematodes and fungi applied to the soil by the roots can kill larvae.