WSU Extension

Hortsense

Caption: Madrone leafminer and shieldbearer damage
Photo by: S.J. Collman
  
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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