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 : Madrone leafminer
(revision date: 6/24/2015)


Biology
Larvae of this leaf and twig mining moth blaze sinuous, serpentine mines across the upper sides of leaves. Since leafminers usually cause only minor damage, they do not affect the long-term health of the tree.
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