View Pests Listed By Host as a PDF

APPLE/CRABAPPLE (Malus)

Aphids Fire Blight
Apple Scab Forest Tent Caterpillars
Blister Mites Nectria Canker
Cedar-Apple Rust Oystershell Scale
Cedar-Hawthorn Rust Pear Sawfly or Pearslug
Codling Moth Powdery Mildew
Cytospora Canker Two-Spotted Spider Mite

 

ARBORVITAE (Thuja)

Aphids Spruce Spider Mite
Phomopsis Tip Blight  

 

ASH (Fraxinus)

Anthracnose Eriophyid Mites
Aphids Forest Tent Caterpillars
Ash Bark Beetles Leafcurl Ash Aphid
Ash Flower Gall Mite Oystershell Scale
Ash Plant Bug Powdery Mildew
Cytospora Canker Two-Spotted Spider Mite

 

BIRCH (Betula)

Aphids Cytospora Canker
Bronze Birch Borer Two-Spotted Spider Mite

 

BOXELDER (Acer)

Cottony Maple Scale Eriophyid Mites
Bacterial Wetwood Powdery Mildew

 

BUR OAK (Quercus)

Anthracnose Powdery Mildew
Oak Leaf Blister Rough Bulletgall Wasp

 

CHERRY/PLUM (Prunus)

Aphids Eriophyid Mites
Black Knot Forest Tent Caterpillars
Coryneum Blight (Shot Hole Disease) Pear Sawfly or Pearslug
Cytospora Canker  

 

COTONEASTER (Cotoneaster)

Aphids Oystershell Scale
Fire Blight Pear Sawfly or Pearslug
Nectria Canker  

 

DOUGLAS-FIR (Pseudotsuga)

Cooley Spruce Gall Adelgid Rhabdocline Needle Cast
Cytospora Canker Rhizosphaera Needle Cast
Douglas-Fir Tussock Moth Spruce Bud Scale
Engraver Beetles Spruce Spider Mite
Giant Conifer Aphids Swiss Needle Cast
Mountain Pine Beetle Western Spruce Budworm
Pine Needle Scale  

 

ELM (Ulmus)

Aphids Dutch Elm Disease
Bacterial Wetwood/Slime Flux Eriophyid Mites
Cytospora Canker European Elm Scale

 

FIR (Abies)

Cooley Spruce Gall Adelgid Pine Needle Scale
Cytospora Canker Rhizosphaera Needle Cast
Douglas-fir Tussock Moth Spruce Spider Mite
Engraver Beetles Spruce Bud Scale
Giant Conifer Aphids Western Spruce Budworm
Mountain Pine Beetle  

 

GRAPE (Vitis)

Aphids Powdery Mildew
Leafhoppers Root Weevils

 

HACKBERRY (Celtis)

Aphids Eriophyid Mites
Cottony Maple Scale  

 

HAWTHORN (Crataegus)

Aphids Fire Blight
Cedar-Hawthorn Rust  

 

HONEYLOCUST (Gleditisia)

Bacterial Wetwood/Slime-flux Eriophyid Mites
Cottony Maple Scale Nectria Canker
Cytospora Canker  

 

JUNIPER (Juniperus)

Cedar-Apple Rust Kabatina Tip Blight
Cedar-Hawthorn Rust Phomopsis Tip Blight
Giant Conifer Aphids Spruce Spider Mite

 

LILAC (Syringa)

Bacterial Blight of Lilac Powdery Mildew
Eriophyid Mites Root Weevils
Oystershell Scale  

 

LINDEN (Tilia)

Aphids Cytospora Canker
Bacterial Wetwood/Slime-flux Nectria Canker
Cottony Maple Scale  

 

MAPLE (Acer)

Anthracnose Cytospora Canker
Aphids Eriophyid Mites
Bacterial Wetwood/Slime-flux Leafhoppers
Cottony Maple Scale Nectria canker

 

MOUNTAIN-ASH (Sorbus)

Aphids Fire Blight
Cytospora Canker Nectria Canker
Eriophyid Mites  

 

PEAR (Pyrus)

Aphids Fire Blight
Blister Mites Forest Tent Caterpillars
Cedar-Hawthorn Rust Nectria Canker
Codling Moth Oystershell Scale
Cytospora Canker Pear Sawfly or Pearslug
Eriophyid Mites Two-Spotted Spider Mite

 

PINE (Pinus)

Diplodia Tip Blight Pine Needle Scale
Dothistroma Needle Blight Rhizosphaera Needle Cast
Giant Conifer Aphids Spruce Spider Mite
Engraver Beetles Western Gall Rust
Eriophyid Mites White Pine Weevil
Mountain Pine Beetle  

 

POPLAR/ASPEN/COTTONWOOD (Populus)

Aphids Forest Tent Caterpillars
Aspen Blotch Leafminer Marssonina Leaf Spot
Bacterial Wetwood/Slime-flux Oystershell Scale
Crown Gall Poplar Borer
Cytospora Canker Powdery Mildew
Eriophyid Mites Venturia Leaf and Shoot Blight

 

SPRUCE (Picea)

Cooley Spruce Gall Adelgid Rhizosphaera Needle Cast
Cytospora Canker Sudden Needle Drop
Douglas-Fir Tussock Moth Spruce Bud Scale
Engraver Beetles Spruce Spider Mite
Eriophyid Mites Stigmina Needle Cast
Giant Conifer Aphids Western Spruce Budworm
Mountain Pine Beetle White Pine Weevil
Pine Needle Scale  

 

VIRGINIA CREEPER (Parthenocissus)

Aphids Root Weevils
Leafhoppers Powdery Mildew

 

WILLOWS (Salix)

Aphids Oystershell Scale
Black Canker of Willow Two-Spotted Spider Mites
Cytospora Canker Willow Redgall Sawfly
Eriophyid Mites  
Forest Tent Caterpillars  
Marssonina Leaf Spot