Madrone: Shield bearer

Photo by: S.J. Collman

Use IPM (Integrated Pest Management) for successful plant problem management.

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

• Natural predators may help control populations. Encourage predators such as green lacewings and spiders.

Revision Date:5/6/2009

If damage should become severe or summer brings a prolonged drought, spring applications of imidacloprid may be warranted.

If you choose to use a pesticide, some examples of products that are legal in Washington are listed below.

Always read and follow all label directions.


• Bayer Advanced Complete Insect Killer Conc
• Bayer Advanced Garden Power Force Multi-Insect Killer Conc
• This list may not include all products registered for this use.

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