Managing Pests in Gardens: Trees and Shrubs: Elm

Pests in Gardens and Landscapes

Elm—Ulmus spp.

Plant Identification

Elm species are large deciduous to partially deciduous trees. They are useful landscape trees adaptable to many sites. They tend to be shallow rooted.

Optimum conditions for growth

Elm trees can be planted in various climatic zones, depending on species. They do well in full sun and with moderate and regular irrigation.

Leaves of elm
Leaves of Liberty elm

Pests and disorders of *Ulmus* spp.
Invertebrates Aphids Elm leaf aphid Bark beetles European elm bark beetle Carpenterworm European elm scale Foliage-feeding caterpillars Fall webworm Fruittree leafroller Omnivorous looper Spiny elm caterpillar Western tiger swallowtail Glassy-winged sharpshooter Leaf beetles Elm leaf beetle Leafhoppers Rose leafhopper Soft scales Citricola scale European fruit lecanium Frosted scale Woolly aphids Woolly apple aphid Woolly elm aphid	Diseases Anthracnose Chinese elm anthracnose Canker diseases Nectria canker Dutch elm disease Foamy canker Powdery mildew Verticillium wilt Viruses Cherry leaf roll virus Elm mosaic virus Wetwood or slime flux Wood decay Environmental disorders Frost Leaf burn or scorch Lightning Mineral deficiencies Nutrient and mineral excesses Poor water management Weeds Vertebrates

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How to Manage Pests

Pests in Gardens and Landscapes

Elm—Ulmus spp.

Plant Identification

Optimum conditions for growth

Invertebrates

Diseases

Environmental disorders

Weeds

Vertebrates