Skip to main content
All ornamentals

Insects

Important Pests of Ornamental Aspen Balsam Wooly AldelgidBark Beetles (Dendroctonus valens) Boxelder Leafroller (Archips negundana)Brown Marmorated Stink Bug (Halyomorpha halys)Bumble Flower BeetleCankerworms (Alsophila pometaria & Paleacrita vernata) Carpenterworm (Prionoxystus robiniae)Elm Bark Beetles and Dutch Elm DiseaseEmerald Ash Borer Eriophyid Mites, bud, blister, gall, and rust mitesEuropean Earwig (Forficula auricularia)Fall Webworm (Hyphantria cunea)
Flatheaded BorerJapanese Beetle (Popillia japonica)Leafhoppers in the Home Garden
Lilac-Ash Borer (Podosesia syringae)Locust Borer (Megacyllene robiniae)
Oystershell Scale (Lepidosaphes ulmi)Poplar Borer (Saperda calcarata)Poplar Bud Gall Mite (Eriophyes parapopuli)Sequoia Pitch MothShothole BorerSoft Scales in Utah

Diseases

Anthracnose (Kabatiella apocrypta and Apiognomonia spp.) Aspen Leaf Spot (Marssonina spp.) Cytospora or Perennial Canker (Cytospora spp.) Dothistroma Needle Blight (Mycosphaerella pini) Fire Blight (Erwinia amylovora) Herbicide Injury Iron Chlorosis Leaf Scorchneedle drop Oak Leaf Blister (Taphrina caerulescense) OedemaOther Diseases of Trees, Shrubs, and Vines Phytophthora Root Rot (Phytophthora spp.) Slime FluxVerticillium Wilt (Verticillium albo-atrum) Winter Injury

Image Attribution

Boxelder Leafroller: USDA Forest Service - Ogden , USDA Forest Service, Bugwood.org
Brown Marmorated Stink Bug: Susan Ellis, Bugwood.org
Cankerworms: Pennsylvania Department of Conservation and Natural Resources - Forestry , Bugwood.org
Carpenterworm: Bob Hammon, Colorado State University, Bugwood.org
Elm Bark Beetles, Eriophyid Mites, Oystershell Scale, & Poplar Bud Gall Mite: Whitney Cranshaw, Colorado State University, Bugwood.org
European Earwig & Japanese Beetle: David Cappaert, Bugwood.org
Fall Webworm: Steven Katovich, USDA Forest Service, Bugwood.org
Locust Borer: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Soft Scales: Lacy L. Hyche, Auburn University, Bugwood.org
Cytospora Canker: William Jacobi, Colorado State University, Bugwood.org
Fire Blight: Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State University, Bugwood.org
Herbicide Injury: North Carolina Forest Service , Bugwood.org
Iron Chlorosis: Cheryl Kaiser, University of Kentucky, Bugwood.org
Needle Blight: USDA Forest Service - Region 8 - Southern , USDA Forest Service, Bugwood.org
Needle Drop: Ladd Livingston, Idaho Department of Lands, Bugwood.org
Other Diseases: Manfred Mielke, USDA Forest Service, Bugwood.org
Phytophthora Root Rot: H.J. Larsen, Bugwood.org