WSU Extension


Anthracnose and Bull's-eye rot 
Bitter pit 
Crown and collar rot 
Crown gall 
Cytospora canker 
Fire blight 
Fruit russeting 
Nectria canker (European canker) 
Nectria twig blight (Coral spot) 
Perennial canker (Bull's-eye rot) 
Phytophthora fruit rot 
Powdery mildew 
Virus diseases 
Apple ermine moth 
Apple maggot 
Apple-and-thorn skeletonizer 
Brown marmorated stink bug 
Codling moth 
Cutworms and armyworms 
Fruittree leafroller 
Lecanium scale 
San Jose scale 
Spider mites 
Tent caterpillars 
Tentiform leafminer 

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Caption: An adult European earwig
Photo by: M. Bush
Apple : Earwigs
(revision date: 7/13/2015)

Earwigs are reddish-brown insects about 3/4" or less in length. Both males and females have pincers at the rear end. Earwigs are largely beneficial, feeding on many pests such as aphids (including apple aphids), mites, and nematodes, as well as on algae, fungi, and decaying plant material. However, earwigs can also damage plants. They sometimes feed on flowers, shoot tips, leaves, or fruit. Damaged shoot tips may fail to develop properly, sometimes stunting growth. Damaged leaves exhibit small to large holes. Fruit damage consists of shallow, irregular areas chewed into the surface.
Management Options

Non-Chemical Management
  • Rolled newspapers or flat boards placed beneath trees can serve both as monitoring devices and as traps for earwigs, which prefer narrow, enclosed hiding places.
  • Remove tree wraps, which may provide shelter for earwigs.
Select non-chemical management options as your first choice!

Chemical Management

None recommended


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Caption: An adult European earwig
Photo by: M. Bush
Caption: European earwig
Photo by: Unknown
Caption: European earwig damage to pear
Photo by: J.F. Brunner