How to Manage Pests

Pests in Gardens and Landscapes

Cypress bark moths—Laspeyresia cupressana and Epinotia hopkinsana

Larvae of cypress bark moths are up to 0.5 inch long and feed under the bark, in cones, or on foliage.

Damage

Branches are killed, sometimes to the trunk. Coarse boring dust is seen at trunk wounds and branch crotches. Larvae are often seen colonizing cypress cankers, but they do not cause the cankers.

Solutions

Provide plants with proper cultural care. Avoid excess water and fertilizer, which promote rapid growth and susceptible thin bark. Avoid wounding bark. Control is not usually warranted.

 

Red fass on branch
Red frass on branch; larval emergence hole in cone

Bark moths colonize
Bark moths colonize cypress canker


Statewide IPM Program, Agriculture and Natural Resources, University of California
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