All fruit trees
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.
Semi-circular notches at leaf edges; reduced tree vigor and increased drought stress.
Check for leaf damage in summer.
No threshold determined.
Degree Day Model
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.