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Photos of Insects and Diseases of Woody Plants in North Dakota

(See also NDSU Extension Bulletin F-1192 [html] [pdf])

This page and the photo pages are still under construction.

Host Index

Host Insect(s)/Mite(s) Disease(s) and Disorders
Arborvitae Fletcher scale
Spruce spider mite
Winter injury
Ash Aphids
Ash bark beetles
Ash flower gall mite
Ash/lilac borer
Ash plant bug
Cankerworms
Carpenterworm
European fruit lecanium scale
Fall webworms
Forest tent caterpillar
Redheaded ash borer
Ash anthracnose
Ash rust
Ash yellows
Stem Decays
Verticillium wilt
Aspen Fall webworm
Forest tent caterpillar
Leaf miners
Poplar borer
Armillaria root rot
Melampsora leaf rust
Poplar cankers
Septoria leaf spot
Stem decays
Birch Birch leafminer
Bronze birch borer
Fall webworm
Forest tent caterpillar
Melanconium canker
Stem Decays
Boxelder Boxelder erineum gall mite
Boxelder bug
Boxelder twig borer
Cankerworms
Cottony maple scale
Fall webworm
Herbicide injury
Tubercularia canker
Stem decay
Buckeye   Environmental leaf scorch
Caragana Blister beetles
Grasshoppers
Leafhoppers
Caragana canker
Schizophyllum sapwood rot
Septoria leaf spot
Stem decays
Chokecherry Chokecherry midge
Chokecherry pocket gall mite
Eastern tent caterpillar
Fall webworm
Prairie tent caterpillar
Uglynest caterpillar
Black knot
Brown rot
Leaf curl
Stem decays
Valsa canker
X-disease
Cotoneaster Oystershell scale
Pear slug sawfly
Camarosporium canker
Fireblight
Cottonwood Cottonwood leaf beetle
Fall webworm
Leaf miners
Poplar borer
Forest tent caterpillar
Poplar bud gall mite
Poplar petiole gall aphid
Leaf and shoot blight
Melampsora leaf rust
Poplar cankers
Septoria leaf spot
Stem decays
Wetwood
Crabapple Fall Webworm Apple scab
Black rot
Cedar-apple rust
Fireblight
Frogeye leaf spot
Powdery mildew
Schizophyllum sapwood rot
Stem decays
Elm Cankerworms
Carpenterworm
Cottony maple scale
Elm leaf beetle
Elm sawfly
European elm bark beetle
European elm scale
Forest tent caterpillar
Native elm bark beetle
Wooly elm aphid-see Aphids
Botryodiplodia canker
Dutch elm disease
Elm black leaf spot
Elm wilt
Herbicide injury
Stem decays
Tubercularia canker
Verticillium wilt
Wetwood
Hackberry Hackberry nipplegall psyllid
Red-headed ash borer
Hackberry Witches's-broom
Hawthorn Pear slug sawfly Cedar-apple rust
Environmental leaf scorch
Fireblight
Honeylocust Cottony maple scale
Honeylocust pod gall midge
Schizophyllum sapwood rot
Tubercularia canker
Winter injury
Honeysuckle Honeysuckle aphid Powdery mildew
Juneberry Wooly elm aphid [on roots] - 
see Aphids
Black leaf and witches'-broom
Cedar-apple rust

Juniper

(Cedar)

Fletcher scale
Spittlebugs
Spruce spider mite
Cedar-apple rust
Kabatina tip blight
Lilac Ash/lilac borer
Oystershell scale
Gray mold
Lilac witches'-broom
Powdery mildew
Stem decays
Linden Cottony maple scale
Forest tent caterpillar
Environmental leaf scorch
Maple Cottony maple scale
Fall webworm
Maple bladdergall mite
Eutypella canker
Iron chlorosis
Sunscald
Tarspot
Winter injury
Mountain-ash Pear slug sawfly Apple scab
Black rot canker
Fireblight
Sun scald
Oak Cankerworms
Forest tent caterpillar
Numerous gall forming insects
Oak bullet gall wasp
Oak erineum gall mite--see Mites
Oak lace bug
Two-lined chestnut borer
Variable oakleaf caterpillar
Oak anthracnose
Oak leaf curl
Powdery mildew
Stem decays
Pine Dioryctria moth
Introduced pine sawfly
Pine aphids
Pine needle scale
Spruce spider mite
Sphaeropsis shoot blight
Sooty mold
Needle diseases
White pine blister rust
Western gall rust
Winter injury
Plum Chokecherry pocket gall mite Black knot
Brown rot
Phomopsis canker
Plum pockets
Powdery mildew
Shothole
Stem decays
Valsa canker
Poplars Carpenterworm
Cottonwood leaf beetle
Cottony maple scale
Forest tent caterpillar
Fall webworm
Poplar borer
Poplar bud gall mite
Poplar petiole gall aphid
Marssonina leaf spot 
Melampsora leaf rust
Poplar cankers
Septoria leaf spot
Rose Aphids
Rose leaf miners
Spider mites
Gray mold
Powdery mildew
Rose black spot
Rose rust
Viruses
Russian-olive   Tubercularia canker
Phomopsis shoot blight
Spruce Eastern spruce gall adelgid
Pine needle scale
Spruce budworm
Spruce needleminer
Spruce spider mites
Yellowheaded spruce sawfly
Cytospora canker
Rhizosphaera needlecast
Winter injury
Viburnum Cecidophyes sp. mite
Dogwood borer
 
Willow Cottonwood leaf beetle
Elm sawfly
Poplar borer
Black willow aphid - see Aphids
Cankers - see Poplar cankers
Leaf and shoot blight
Leaf rust
Stem decays
Yew Fletcher scale Winter injury


NDSU Extension Service, North Dakota State University of Agriculture and Applied Science, and U.S. Department of Agriculture cooperating. Sharon D. Anderson, Director, Fargo, North Dakota. Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. We offer our programs and facilities to all persons regardless of race, color, national origin, religion, sex, disability, age, Vietnam era veterans status, or sexual orientation; and are an equal opportunity employer.
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