By Host

wpe5.jpg (2127 bytes) U.P. TREE IDENTIFICATION KEY
from Michigan State University Extension

FOREST HEALTH - PESTS SORTED BY HOST TREE SPECIES

If the correct tree species or genus has been identified, the pool of pest possibilities is substantially reduced. The pests associated with the following tree species are not comprehensive lists. They are the more likely candidates for something that's bugging you (or your tree).

The pests listed under "general" headings are not necessarily repeated under individual tree species listings. So, look both under a particular tree species as well as the associated general listing. Pests listed under particular hosts indicate common occurence, but arte not necessarily exclusive to that particular host. This website is an attempt to highlight most of the more common tree pests. A comprehensive index would take many pages using a small font size.

HARDWOODS (trees with broadleaves)

Tree Host	Insects	Diseases	Others
General	leaf galls, leafminers, loopers, cankerworms, skeletonizers, tussock moths, ambrosia beetles, bark beetles, carpenter worm, horntails, powder-post beetles, aphids/adelgids, scales, white grubs, ants	Anthracnoses, wilts, diebacks, declines, Armillaria, trunk rots	burls, deer, garlic mustard, buckthorn, mice, nematodes, pileated woodpeckers, sapsuckers, porcupines, frost damage, herbicide damage, drought, road salt, lightning, leaf scorch, snow, hail, ice, wildfire
Apples	eastern tent caterpillar, gypsy moth, cankerworms, skeletonizers, tussock moths	fire blight (no reference on this site)	frost cracking
Ashes	fall webworm, gypsy moth, cankerworms, emerald ash borer	ash dieback	beavers
Aspens	forest tent caterpillar, large aspen tortrix, leafminers, mourning cloak, tussock moths, aphids	Septoria canker, aspen shoot blight, Hypoxylon canker, Phellinus	beavers, leaf scorch
Balm	large aspen tortrix
Basswood	loopers, cankerworms, tussock moths
Beech	cankerworms, beech bark disease (scales)	beech bark disease
Birches	gypsy moth, leafminers, skeletonizers, tussock moths, bronze birch borer		drought, old age
Paper Birch	large aspen tortrix, leafminers, skeletonizers, tussock moths, bronze birch borer		drought, old age
Butternut		butternut canker
Cherries	eastern tent caterpillar, leafminers, cankerworms, tussock moths, ugly nest caterpillar, walkingsticks	black knot	frost cracking
Elms	loopers, cankerworms, mourning cloak, tussock moths, carpenter worm, oak twig pruner	Dutch elm disease
Hackberry	leaf galls, tussock moths
Hickory	bark beetles	hickory decline	drought
Hawthorne	skeletonizers
Juneberries	eastern tent caterpillars, leafminers, tussock moths	black knot
Maples	forest tent caterpillar, leaf galls, leafminers, cankerworms, tussock moths, Asian longhorned beetle	Anthracnose, maple tar spot, Verticillium wilt, Eutypella canker	frost cracking. leaf scorch
Sugar Maple	forest tent caterpillar, leaf galls, leafminers, cankerworms, tussock moths, Asian longhorned beetle, sugar maple borer, maple petiole borer	sapstreak, Eutypella canker
Mtn. Ash	sawflies		sapsuckers
Oaks	fall webworm, gypsy moth, leaf galls, loopers, cankerworms, orange-striped oakworm, skeletonizers, tussock moths, ugly nest caterpillar, walkingsticks, carpenter worm, red oak borer, two-lined chestnut borer, oak twig pruner	Anthracnose, oak wilt, Cylindrocladium root rot
Willows	large aspen tortrix, leaf galls, mourning cloak, tussock moths, aphids

SOFTWOODS (trees with needles)

Tree Host	Insects	Diseases	Others
General	tussock moths, engraver/bark beetles, horntails, longhorned/sawyer beetles, scales, shoot beetles, shoot moths, spider mites, aphids, spittlebugs	needlecasts, witch's brooms, cankers, trunk rots, Annosum, damping-off disease	burls, deer, garlic mustard, buckthorn, mice, nematodes, pileated woodpeckers, sapsuckers, porcupines, frost damage, herbicide damage, drought, road salt, lightning, leaf scorch, snow, hail, ice, wildfire, winter injury
Balsam Fir	spruce budworm, balsam woolly adelgid	Lirula, red heart	drought, road salt
Cedar		Phomoposis	deer
Hemlock	hemlock borer, hemlock woolly adelgid		sapsuckers
Pines	sawflies, pine root collar weevil, aphids & spittlebugs, Pales weevil, shoot beetles, Eur. pine shoot beetle, shoot moths	red heart, Annosum, Polypores
Jack Pine	jack pine budworm	stem rusts, Scleroderris, Cronartium
Red Pine	pine root collar weevil, European pine shoot moth	stem rusts, Coleosporium, Sphaeropsis, Sirococcus, Scleroderris, Annosum	frost damage
Scots Pine	pine root collar weevil, European pine shoot moth	brownspot, Cyclaneusma, Cronartium
White Pine	white pine weevil	white pine blister rust, red heart, Tomentosus	porcupines, road salt
Spruces	needle galls, spruce budworm, spider mites, eastern spruce gall adelgid	Rhizosphaera, Chrysomyxa, Cytospora, dwarf mistletoe, red heart, Polypores, Tomentosus
Tamarack	larch casebearer	dwarf mistletoe	porcupines

Click HERE to return to the U.P. Tree ID home page.
Click HERE to return to the Forest Health home page.

This site created and maintained by Bill Cook, MSU Extension Forester for the Upper Peninsula of Michigan. Editing and modification is ongoing. Submit suggestions, questions, and corrections to cookwi@msu.edu or call 906-786-1575.