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UC IPM Home > Homes, Gardens, Landscapes, and Turf > Trees and Shrubs > Invertebrate Pests

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How to Manage Pests

Pests in Gardens and Landscapes

Gall aphids

Gall aphids are small, grayish or greenish insects that feed in distorted tissue or in galls. Two common gall aphid species are the manzanita leaf gall ahid, Tamalia coweni, and the poplar petiolegall aphid, Pemphigus sp.

Damage

Foliage feeding by gall aphids causes swellings or galls to form on leaves. Galls are not damaging to trees.

Solutions

Galls are not damaging to trees. No management is required.

Poplar petiolegall aphid in poplar gall
Poplar petiolegall aphid in poplar gall

Manzanita leaf gall aphid in damage
Manzanita leaf gall aphid damage

 

 

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