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Earwigs

 

earwigsearwig peach damage

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.