Hosts: all fruit trees
Biology: The adults are hard, rounded beetles with pronounced “snouts;” active at night. Adults feed on foliage and the small, white legless larvae feed on roots and crowns.
Symptoms/Damage: Semi-circular notches at leaf edges; reduced tree vigor and increased drought stress.
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. Many insecticides can kill adults; entomopathogenic nematodes and fungi applied to the soil by the roots can kill larvae.