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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Photos of Insects and Diseases of Woody Plants in North Dakota

Host Index

NDSU Home Page • NDSU Agriculture NDSU Dept. of Plant Sciences • ND Forest Service

NDSU Home Page • NDSU Agriculture
NDSU Dept. of Plant Sciences • ND Forest Service