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. 

 

This site is hosted by School of Forest Resources and Environmental Science
at Michigan Technological University.

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