WSU Extension

Hortsense

Madrone
 
Disease
Collar rot (Phytophthora) 
Leaf blight 
Leaf gall 
Leaf spot 
Madrone canker 
Insect
Madrone leafminer 
Shield bearer 



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Caption: Madrone leafminer and shieldbearer damage
Photo by: S.J. Collman
  
Madrone : Shield bearer
(revision date: 6/24/2015)


Biology
Shield bearers are moth larvae that mine out elliptical pupal chambers on the leaves. When pupal cells drop off, "shot holes" or small "windows" are observed on the leaves. Shield bearers usually cause only minor damage.
Management Options


Non-Chemical Management
  • Natural predators may help control populations. Encourage predators such as green lacewings and spiders.
Select non-chemical management options as your first choice!

Chemical Management

None recommended.

Images

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Caption: Madrone leafminer and shieldbearer damage
Photo by: S.J. Collman
Caption: Madrone shield bearer damage
Photo by: A.L. Antonelli