Hosts: all fruit trees; cause damage to peach, apricot
Biology: European earwigs overwinter as adults and females lay eggs in the soil in early spring. Populations become noticeable by mid to late June. Wet, cool springs and summers favor this nocturnal insect.
Symptoms: Small holes in fruit and leaves with black dots of frass.
Monitoring: Corrugated cardboard “rolls” tied onto the tree trunk can indicate when earwigs start climbing into trees.
Treatment Threshold: No threshold determined.
Degree Day Model: None
Management Considerations: Earwigs are also predators on other insects, so their presence at times other than when fruits are ripe can be beneficial.