Pests Listed By Host
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)
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 |
