The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."

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Image	Subject Name	Scientific Name	Description
5432982	southern pine beetle	Dendroctonus frontalis
5432983	southern pine beetle	Dendroctonus frontalis
5432985	southern pine beetle	Dendroctonus frontalis
5432986	southern pine beetle	Dendroctonus frontalis
1593087	eastern larch beetle	Dendroctonus simplex	Tamarack infested with eastern larch beetle, bark removal in late winter due to woodpecker probing.
5485677	hemlock woolly adelgid	Adelges tsugae	Hemlock mortality caused by Hemlock Woolly Adelgid (Adelges tsugae).
5488692	peach bark beetle	Phloeotribus liminaris	Mass of gum on bark of black cherry.
2183047	smaller European elm bark beetle	Scolytus multistriatus
1398069	acorn-plum gall	Amphibolips quercusjuglans	galls
1593011	white pine weevil	Pissodes strobi	Older weevil attack that killed the existing terminal when the tree was at the height of damaged whorl. The dead terminal was replaced by severl competing laterals that created a dense cluster of branches at the whorl.
1398253	poplar twiggall fly	Hexomyza schineri	Twig galls
5289050	southern pine beetle	Dendroctonus frontalis	emergence holes
1593089	pine tip root weevil	Hylobius rhizophagus	Branch flagging on a root tip weevil infested tree.
1393005	Asian longhorned beetle	Anoplophora glabripennis	Ravenswood infestation - Chicago - July 1998
1593016	redheaded pine sawfly	Neodiprion lecontei	Feeding damage on a red pine sapling
1593053	white pine weevil	Pissodes strobi	Classic early attack symptoms in the terminal of an infested eastern white pine.
1593083	native elm bark beetle	Hylurgopinus rufipes
1593067	Saratoga spittlebug	Aphrophora saratogensis	Heavily damaged red pine growing in a dense stand of Sweetfern, the nymphal host of the Saratoga spittlebug
1593005	eastern spruce gall adelgid	Adelges abietis	Odler galls caused by eastern spruce gall adelgid
1593012	white pine weevil	Pissodes strobi	Terminal and laterals beging to wilt (die) due to an active infestation of white pine weevil.
1593035	pine engraver	Ips pini	Pine engraver mortality showing up as a pocket of recently killed red pine trees.
5468221	eastern ash bark beetle	Hylesinus aculeatus	exit holes
5468222	eastern ash bark beetle	Hylesinus aculeatus	exit holes
5468223	eastern ash bark beetle	Hylesinus aculeatus	exit holes
5468217	ash borer	Podosesia syringae
5468218	ash borer	Podosesia syringae
1399091	mountain pine beetle	Dendroctonus ponderosae
1468085	fir engraver	Scolytus ventralis
0796008	pine thrips	Gnophothrips spp.	female cone showing partial damage
1396009	bronze birch borer	Agrilus anxius	dead branches
0949036	spruce spider mite	Oligonychus ununguis
3056004	Columbian timber beetle	Corthylus columbianus	flagworm in white oak lumber
3056003	Columbian timber beetle	Corthylus columbianus	Flagworm in boxelder lumber. Note red/pink stains.
3056010	oak timberworm	Arrenodes minutus	holes in oak lumber
1393002	Asian longhorned beetle	Anoplophora glabripennis	Exit hole - 3/8"
5443539	Japanese beetle	Popillia japonica	Skeletonizing on Buckeye, August 2011
5443544	Japanese beetle	Popillia japonica	Defoliation on a buckeye. August 2011
5443545	Japanese beetle	Popillia japonica	Defoliation on a buckeye. August 2011
5443547	Japanese beetle	Popillia japonica	Defoliation on European linden. August 2011
3066059	hawthorn agrilus	Agrilus crataegi	in Creatagus
1468311	sugar pine tortrix	Choristoneura lambertiana
3057027	carpenterworm	Prionoxystus robiniae	lateral bark scar
3056028	oak stem borer	Aneflomorpha subpubescens	in red oak sprout (fig. 165 C in USDA Forest Service Ag. Handbook AH-706, 1995)
2733014	white pine weevil	Pissodes strobi	terminal weevil feeding
2254026	red turpentine beetle	Dendroctonus valens	pitch tubes
2254014	western pine beetle	Dendroctonus brevicomis	bark sloughing off of trees
2254015	western pine beetle	Dendroctonus brevicomis	pitch tubes
2253036	spruce budworm	Choristoneura fumiferana	in cone note frass mass
2253010	pine resin midges	Cecidomyia spp.	flagging terminals
2252079	mountain pine beetle	Dendroctonus ponderosae	boring dust on lodge pole pine
2252059	Gelechiid moths
0796033	southern pine coneworm	Dioryctria amatella	a seed orchard pest
0805050	pineapple gall midges	Rabdophaga spp.	gall on willow
0805031	birch leafroller	Epinotia solandriana	rolled leaf
0796023	webbing coneworm	Dioryctria disclusa	early instar attacks in pollen catkins, note the webbing, a seed orchard pest
0796024	webbing coneworm	Dioryctria disclusa	loblolly pine flowers damaged or killed, a seed orchard pest
0745096	southern pine beetle	Dendroctonus frontalis	pitch tubes on slash pine
0745097	southern pine beetle	Dendroctonus frontalis	pitch tubes
0745081	southern pine beetle	Dendroctonus frontalis	pitch flow
0745079	southern pine beetle	Dendroctonus frontalis	pitch tubes & pitchout on loblolly pine - close up
0745080	southern pine beetle	Dendroctonus frontalis	in slash stand
0590079	red oak borer	Enaphalodes rufulus
0590075	pine webworm	Pococera robustella
0590070	pitch-eating weevil	Pachylobius picivorus
0488090	webbing coneworm	Dioryctria disclusa
0355010	petiolegall psyllid	Pachypsylla venusta	on oak
1406082	poplar gall borer	Saperda inornata	gall breakage
1398168	mountain pine beetle	Dendroctonus ponderosae	Pitch tubes. Medicine Bow Mountains, southeast Wyoming
3066066	hickory agrilus	Agrilus otiosus	bark removed to expose spiral swellings over gallery beneath
1396014	spruce budworm	Choristoneura fumiferana	dead trees
1396032	oak lace bug	Corythucha arcuata
3066041	oak phylloxerids	Phylloxera spp.	new shoots in Nuttall oak seedlings killed
3066065	hickory agrilus	Agrilus otiosus	sinuate gallery under bark
1396124	spruce spider mite	Oligonychus ununguis
1306017	spruce beetle	Dendroctonus rufipennis	spot infestation in southern British Columbia
1306006	mountain pine beetle	Dendroctonus ponderosae	mass attack with pheromone bait
1468249	larch casebearer	Coleophora laricella
1468123	western pineshoot borer	Eucosma sonomana
1468031	western false hemlock looper	Nepytia freemani	1965
0805002	spruce beetle	Dendroctonus rufipennis	infested white spruce attacked by beetles from infested log stack
1748065	southern pine beetle	Dendroctonus frontalis	pitch tubes-closeup
0284077	poplar twig borer	Oberea delongi	larvae in shoots
1470018	poplar gall borer	Saperda inornata
1470031	European pine shoot moth	Rhyacionia buoliana	silhouette
2733050	twig girdler	Oncideres cingulata
3057017	Eriophyid mite		on mid-leaves & recovery of top leaves
3066040	oak phylloxerids	Phylloxera spp.	new shoots on Nuttall oak seedlings killed
3067018	Columbian timber beetle	Corthylus columbianus	entrance hole and oozing sap
4178068	pine colaspis	Colaspis pini	note coloration change due to adult feeding
1678058	white pine weevil	Pissodes strobi
3067056	Pacific flatheaded borer	Chrysobothris mali
1441006	mountain pine beetle	Dendroctonus ponderosae	pitch tubes
3057021	poplar leafcurl midge	Prodiplosis morrisi	earlier damage & recovery
1199034	white pine weevil	Pissodes strobi	Emergence hole
3046085	cottonwood leaf curl mite	Aculus lobulifera
5288050	Ips engraver beetles	Ips spp.	Ips avul & calli in Slash pine
1301045	emerald ash borer	Agrilus planipennis
3057008	cottonwood borer	Plectrodera scalator	fibrous frass at base of stem
3056077	dogwood twig borer	Oberea tripunctata	infested branch flagging
3066013	maple callus borer	Synanthedon acerni
3067082	Columbian timber beetle	Corthylus columbianus
3067095	oak branch borer	Goes debilis	on sapling (note entrance hole and frass)
4212039	white pine weevil	Pissodes strobi	terminal demonstrating characteristic "shepherd's crook" on jack pine
4178063	loblolly pine sawfly	Neodiprion taedae linearis	damage to needles
1398234	poplar borer	Saperda calcarata	Young aspen stem with a sap bleeding wound caused by larval tunneling activity. Chippewa Co, WI 2005
1398057	leafhopper	Typhlocyba albicans	Stippling damage on leaf in early summer. Hiawatha National Forest, MI
0796032	cone worms	Dioryctria spp.	stem attack on loblolly pine
3057090	gallmaking maple borer	Xylotrechus aceris	adult exit hole over attack site
3066067	hickory agrilus	Agrilus otiosus	zig-zag grooves in outer bark
3057029	carpenterworm	Prionoxystus robiniae	lateral feeding scars in trunk
3067053	red oak borer	Enaphalodes rufulus	overgrown bark scar
3067035	ash borer	Podosesia syringae	note clump of frass on terminal
1399074	white pine weevil	Pissodes strobi
1398091	emerald ash borer	Agrilus planipennis
1398093	emerald ash borer	Agrilus planipennis	Boulevard tree with heavy woodpecker activity. Ann Arbor, MI, 2004.
1398041	sugar maple borer	Glycobius speciosus	External damage on live standing tree
1398016	balsam twig aphid	Mindarus abietinus	Twisted needles on new growth, early spring. Photo taken in Anoka County, MN
1400137	periodical cicada	Magicicada septendecim	Branch flagging on bur oak due to oviposition damage by the 1997 brood emergence of the periodical (17 year) cicada in central Iowa.
3067088	living-hickory borer	Goes pulcher	entrance hole in sapling
1398031	locust leafminer	Odontota dorsalis	Leaf mines
1398042	cherry scallop shell moth	Rheumaptera prunivorata	tied foliage
1398230	white pine weevil	Pissodes strobi	Board showing internal damage due to an old white pine weevil attack, large knots and twisted wood grain.
1398191	spruce needleminer	Taniva albolineana
3067047	white oak borer	Goes tigrinus	frass extruding from entrance
1207031	white pine weevil	Pissodes strobi	View of seedling showing effect of repeated damage
1207043	mountain pine beetle	Dendroctonus ponderosae	Close-up of pine bole showing copious attack of beetle, Kelly Prairie, Heppner Ranger District, March 1977
1207035	white pine weevil	Pissodes strobi	Close-up of branch showing holes in bark from weevil feeding
1468321	white pine weevil	Pissodes strobi
1468292	cone borers	Eucosma spp.	stunted terminal
1468288	white fir needleminer	Epinotia meritana	June 10, 1970
0021020	gorse soft shoot moth	Agonopterix ulicitella
1207054	mountain pine beetle	Dendroctonus ponderosae	Granite Creek area showing pine killed by beetle, Baker Ranger District
1468244	tussock moths	Halysidota spp.
1199001	pine root collar weevil	Hylobius radicis	To base.
4060063	larch sawfly	Pristiphora erichsonii	with 5th instar larvae, Cass Lake, Minnesota July '53
1398233	white pine weevil	Pissodes strobi	twisted, old white pine
1398167	pine engraver	Ips pini	Pocket of recently killed older red pine. Superior National Forest, MN
1398192	spruce needleminer	Taniva albolineana	Hollowed-out dead needles webbed onto a white spruce branch. St. Paul, MN
1398194	spruce budworm	Choristoneura fumiferana	Dead and declining white spruce in northern MN following a spruce budworm outbreak
1398139	white pine cone borer	Eucosma tocullionana	Frass extruding from infested cone. Early August at Oconto River seed orchard, Nicolet National Forest in northern Wisconsin
1398226	white pine weevil	Pissodes strobi
1398265	birch leafminer	Fenusa pusilla	Brown blistered leaves on a paper birch, late spring in northern Minnesota
1468129	pinyon spindlegall midge	Pinyonia edulicola
3056052	willow shoot sawfly	Janus abbreviatus	causing shoot dieback
3056096	cottonwood clearwing borer	Paranthrene dollii	stem damage with frass
1441072	cone worms	Dioryctria spp.	Nebraska National Forest
3066033	cambium miners	Phytobia spp.	in root [note mine pattern]
1396127	leafhopper	Typhlocyba albicans	Hiawatha National Forest
1306012	mountain pine beetle	Dendroctonus ponderosae	pitch tube
1468339	western pine beetle	Dendroctonus brevicomis	1967
1398258	leafminer flies
1470069	European pine shoot moth	Rhyacionia buoliana
3056085	poplar branch borer	Oberea schaumii	stem damage
3057094	pecan carpenterworm	Cossula magnifica	entrance hole, frass pellets and stained bark on trunk
1393011	Asian longhorned beetle	Anoplophora glabripennis	Oviposition niche. Ravenswood infestation - Chicago - August 1998
1441011	mountain pine beetle	Dendroctonus ponderosae
1468240	tussock moths	Halysidota spp.	1978
1468285	white fir needleminer	Epinotia meritana
3057005	cottonwood borer	Plectrodera scalator	fibrous frass at base of stem
3056047	boxelder twig borer	Proteoteras willingana	twig swelling with frass at entrance hole
3056040	lesser peachtree borer	Synanthedon pictipes	attack at old pruning scar in black cherry
3057050	southeastern gray twig pruner	Anelaphus villosus	terminal girldled on young oak
1306016	red turpentine beetle	Dendroctonus valens	on fire-scarred tree
3057003	poplar borer	Saperda calcarata	damage to stem by cluster of borers
1212015	Douglas-fir tussock moth	Orgyia pseudotsugata	Indian Creek area, Heppner RD, Umatilla NF, 2001
1457042	webbing coneworm	Dioryctria disclusa	Infested red pine cone. Granular frass visible at the base of the cone. A large entry hole can be found near the cone base.
2733041	oak skeletonizer	Bucculatrix ainsliella
1468312	sugar pine tortrix	Choristoneura lambertiana	1967
3056044	maple twig borer	Proteoteras aesculana
2252060	Douglas-fir needle midge	Contarinia pseudotsugae
1441029	western balsam bark beetle	Dryocoetes confusus	in August 1977
3067006	tupelo borer	Aegomorphus morrisii	feeding damage (bark scar)
0806073	western spruce budworm	Choristoneura freemani	two trees side by side; one dead, one alive; Both trees were exposed to intense feeding by western spruce budworm; one was completely defoliated, whereas the other sustained relatively minor damage, suggesting by their proximity that some sort of genetic resistance may be involved. Starkey Experimental Forest, Wallowa-Whitman National Forest, northeastern Oregon
3057082	redheaded ash borer	Neoclytus acuminatus	adult exit holes
1468156	lodgepole sawfly	Neodiprion burkei
1441062	sugar pine tortrix	Choristoneura lambertiana	to new shoots
1398037	twolined chestnut borer	Agrilus bilineatus	Dead and dying branches in the upper crown of a white oak, early evidence of two-lined chestnut borer attack. Photo taken in St. Paul, MN
3056051	willow shoot sawfly	Janus abbreviatus	round exit hole in willow shoot (Fig. 235G in USDA Forest Service Ag. Handbook AH-706, 1995)
1441025	spruce beetle	Dendroctonus rufipennis
1398228	white pine weevil	Pissodes strobi	Evidence of an old weevil attack on a 20-25 yr old white pine in Wisconsin.
1468399	mountain pine beetle	Dendroctonus ponderosae
1241521	pine tip moths	Rhyacionia spp.	Pine terminal killed by pine tip moth. Note the resin at the attack site near the bud and the exit hole produced by the larva as it left the terminal to pupate in the duff.
1199019	white pine cone borer	Eucosma tocullionana
0590091	pine webworm	Pococera robustella	severe damage to pine seedling
4178066	loblolly pine sawfly	Neodiprion taedae linearis	and larvae on foliage
1468338	western pine beetle	Dendroctonus brevicomis	May 1976
1241601	defoliating weevil	Magdalis gentilis	Typical chewing caused by defoliating weevils leaves chunks of needles missing or broken off.
1241513	white pine weevil	Pissodes strobi
1241605	sugar pine tortrix	Choristoneura lambertiana	Chewed and webbed needles showing damage caused by larvae. Damage is similar to western spruce budworm.
3067057	Pacific flatheaded borer	Chrysobothris mali
1398193	spruce gall midge	Mayetiola piceae
3056076	raspberry cane borer	Oberea perspicillata	gum and frass (Fig. 148D in USDA Forest Service Ag. Handbook AH-706, 1995)
1199035	white pine weevil	Pissodes strobi
3066042	leafcurl ash aphid	Meliarhizophagus fraxinifolii	heavily curled leaves caused by aphids with a cluster of green lacewing eggs
1388024	balsam twig aphid	Mindarus abietinus	Twisted (distorted) new foliage
1441054	Douglas-fir tussock moth	Orgyia pseudotsugata	in 1983
1398033	bronze birch borer	Agrilus anxius
1207038	white pine weevil	Pissodes strobi	sapling or small pole showing terminal leader damaged by weevil feeding
1441044	western spruce budworm	Choristoneura freemani
1398232	pine engraver	Ips pini	Pocket of dead older red pine killed by Ips pini,
0014328	subterranean termite	Reticulitermes spp.	This house was less than five years old. Photo originally came from the Wood Products Insect Lab in Gulfport, Mississippi.
1306020	spruce beetle	Dendroctonus rufipennis	spot infestation in southern British Columbia
1398211	red pine cone beetle	Conophthorus resinosae	Pitch tube on twig
1241469	Douglas-fir beetle	Dendroctonus pseudotsugae	Red-orange boring dust is evidence of successful attack.
1361021	white pine weevil	Pissodes strobi	When terminal branch is killed, it is replaced by an adjacent branch, which results in a crooked or forked stem.
0806067	fir engraver	Scolytus ventralis	Red foliage stage. Malheur National Forest, northeastern Oregon
5432268	goldspotted oak borer	Agrilus coxalis auroguttatus	Staining on the bark surface of coast live oak, Quercus agricola, resulting from Agrilus auroguttatus larval feeding
5431707	Asian longhorned beetle	Anoplophora glabripennis	oviposition pit
3057046	southeastern gray twig pruner	Anelaphus villosus	top of sapling pruned by beetle
1398114	white pine cone beetle	Conophthorus coniperda	Dead cones hanging on tree
3067050	red oak borer	Enaphalodes rufulus	lateral scars left by borers
1441026	Douglas-fir beetle	Dendroctonus pseudotsugae	Golden Gate Canyon State Park, Colorado, March 1989
1199010	bronze birch borer	Agrilus anxius
1468357	European pine shoot moth	Rhyacionia buoliana	Mountain View Ranger District - Wasatch-Cache National Forest, Utah
1199011	birch leafminer	Fenusa pusilla	Leaf mines
1393006	Asian longhorned beetle	Anoplophora glabripennis	Ravenswood infestation - Chicago - July 1998
1199036	white pine weevil	Pissodes strobi	Stem deformity caused by an earlier attack
1241471	Douglas-fir beetle	Dendroctonus pseudotsugae	Trees killed will have red crowns several months after a successful attack.
3067037	leafcurl midges	Dasineura spp.
1468287	white fir needleminer	Epinotia meritana
3067004	tupelo borer	Aegomorphus morrisii	bark indicators at attack sites on sapling
0488048	tip moth
1199016	pine engraver	Ips pini	Exit holes
1398112	white pine cone borer	Eucosma tocullionana	Attacked mature cones, early August. Oconto River Seed orchard, Nicolet National Forest, WI
0745023	black turpentine beetle	Dendroctonus terebrans	pitch tubes and infestation following mechanical damage
3036095	red oak borer	Enaphalodes rufulus	old damage at base of tree
3066087	eastern ash bark beetle	Hylesinus aculeatus	galleries on surface of sapwood
1441063	sugar pine tortrix	Choristoneura lambertiana	defoliation
2253085	western balsam bark beetle	Dryocoetes confusus
2253066	lodgepole terminal weevil	Pissodes terminalis	terminal damage
1398238	bronze poplar borer	Agrilus liragus	Winding gallery pattern showing on the outer bark
1396117	red turpentine beetle	Dendroctonus valens
2253004	lodgepole terminal weevil	Pissodes terminalis	terminal damage to small tree
1207029	fir engraver	Scolytus ventralis	Small group of fir killed by beetle in Little Bald Mountain area, Walla Walla Ranger District, 1976
1468308	sugar pine tortrix	Choristoneura lambertiana	past defoliation evident
1678034	Douglas-fir tussock moth	Orgyia pseudotsugata
3056020	chestnut timberworm	Melittomma sericeum	dead chestnut and live sprouts
1748055	sugar maple borer	Glycobius speciosus
2132078	debarking weevil	Hylobius xiaoi	Girdled tree
1468309	sugar pine tortrix	Choristoneura lambertiana
3067090	living-hickory borer	Goes pulcher
3067045	oak sapling borer	Goes tesselatus
1306009	mountain pine beetle	Dendroctonus ponderosae	spot infestation
1468275	poplar borer	Saperda calcarata
1468258	spruce spider mite	Oligonychus ununguis
2253049	larch casebearer	Coleophora laricella	defoliation and needle color change due to feeding of larvae
2252019	spruce budworm	Choristoneura fumiferana	defoliation
1241476	fir engraver	Scolytus ventralis	Top kill and tree mortality.
2132081	debarking weevil	Hylobius xiaoi
1587140	pine butterfly	Neophasia menapia
1587126	western hemlock looper	Lambdina fiscellaria lugubrosa	looper mortality
1587024	Douglas-fir engraver	Scolytus unispinosus	DF top killed during droughty period, probably DF engraver beetles or DF pole beetle
1587158	western spruce budworm	Choristoneura freemani	defoliated top
1587127	western hemlock looper	Lambdina fiscellaria lugubrosa
1587110	Contarinia spp.	Contarinia spp.
1587105	Douglas-fir tussock moth	Orgyia pseudotsugata
1587103	Douglas-fir tussock moth	Orgyia pseudotsugata
1587082	white pine weevil	Pissodes strobi
1587054	western balsam bark beetle	Dryocoetes confusus	Old balsam woolly adelgid and western balsam bark beetle, subalpine fir (SAF)
1587051	western balsam bark beetle	Dryocoetes confusus
1587041	mountain pine beetle	Dendroctonus ponderosae	MPB, Current year fader, Fading PP in control plot
1468214	western spruce budworm	Choristoneura freemani
1388033	leafhopper	Typhlocyba albicans	Michigan's Upper Peninsula
1388025	red pine shoot moth	Dioryctria resinosella	Pitch tube on a shoot infested with a single larva
1388021	twolined chestnut borer	Agrilus bilineatus	Early signs of attack. Dead and dying branches in the upper crown.
0745078	southern pine beetle	Dendroctonus frontalis	pitch tubes & pitchout on loblolly pine
1241738	cone worms	Dioryctria spp.	Pitch mass showing mass opened to expose larva.
1468118	white pine weevil	Pissodes strobi
1470053	spruce budworm	Choristoneura fumiferana
0976077	sawflies		South Platte Ranger District
1241733	sequoia pitch moth	Synanthedon sequoiae	Pitch masses indicating entrance and feeding sites.
1468119	lodgepole terminal weevil	Pissodes terminalis
0806070	western spruce budworm	Choristoneura freemani	with 4-foot topkill from defoliation. Malheur National Forest, northeastern Oregon
0806065	western spruce budworm	Choristoneura freemani	Saplings & small poles with topkill from defolliation. Malheur National Forest, northeastern Oregon
2121099	red pine shoot moth	Dioryctria resinosella	Infested shoot that has died, characteristic damage in late summer. Photo taken in July 2005
1241516	lodgepole terminal weevil	Pissodes terminalis
1467060	mountain pine beetle	Dendroctonus ponderosae
0488065	pip gall wasp	Callirhytis operator	to acorn
0806066	western spruce budworm	Choristoneura freemani	Mortality. Aldrich Mountains, Bear Valley Ranger District, Malheur National Forest, northeastern Oregon
0806064	western spruce budworm	Choristoneura freemani	seedling missing about 50% of its foliage from defoliation. Malheur National Forest, northeastern Oregon
2121098	white pine weevil	Pissodes strobi	Terminal portion of a Jack pine killed by white pine weevil larval feeding. This is relatively common in Michigan and Wisconsin. Photo taken July 2005
1678059	white pine weevil	Pissodes strobi	dead spruce terminal, adult emergence holes visible
3067007	Japanese beetle	Popillia japonica	on seedlings
3057002	poplar borer	Saperda calcarata	stem breakage (Note galleries at site of break)
3056055	poplar gall borer	Saperda inornata	multiple gall-like swellings (Fig. 131F - Solomon)
3066046	poplar leaf aphid	Chaitophorus populicola	on 1st year plantation
3056068	poplar-and-willow borer	Cryptorhynchus lapathi	in hybrid poplar stem breakage
3067040	ash borer	Podosesia syringae	attack & frass on terminal
1470066	Nantucket pine tip moth	Rhyacionia frustrana
1467091	spruce coneworm	Dioryctria abietella
1306023	Douglas-fir beetle	Dendroctonus pseudotsugae	spot infestation
3067003	walnut caterpillar	Datana integerrima	mass of molting larvae on side of trunk
3066019	pinhole borer	Platypus spp.	in hardwood log (note strings of frass being extruded from gallery openings)
1241737	cone worms	Dioryctria spp.	Pitch mass on small lodgepole pine stem showing appearance of resin mass.
1241735	sequoia pitch moth	Synanthedon sequoiae	Pine with unusually heavy damage.
3066068	hickory agrilus	Agrilus otiosus	note spiral swellings in bark over gallery
3067073	whitefringed beetles	Naupactus spp.	damaged seedling
1399063	pine root collar weevil	Hylobius radicis
2253006	western pineshoot borer	Eucosma sonomana	shoot split to show larva damage. Note larva at end of tweezers
1241463	Ips engraver beetles	Ips spp.	Top kill from Ips attack.
0796031	southern pine coneworm	Dioryctria amatella	bud and shoot damage larva following male flower injuries on longleaf pine, a seed orchard pest
1207055	mountain pine beetle	Dendroctonus ponderosae	pine stand killed by beetle, La Grande Ranger District
1468286	white fir needleminer	Epinotia meritana
3225080	Asian longhorned beetle	Anoplophora glabripennis
1406083	poplar gall borer	Saperda inornata	gall on hybrid cottonwood
5289056	southern pine beetle	Dendroctonus frontalis	natural causes
5289058	southern pine beetle	Dendroctonus frontalis	natural causes
5289060	southern pine beetle	Dendroctonus frontalis	Tornado damage can be inciting factors for Southern Pine beetle outbreaks.
5289061	southern pine beetle	Dendroctonus frontalis	Tornado damage can be inciting factors for Southern Pine beetle outbreaks.
5289052	southern pine beetle	Dendroctonus frontalis	Lightning strikes can be inciting factors for Southern Pine beetle outbreaks.
5289053	southern pine beetle	Dendroctonus frontalis	Lightning strikes can be inciting factors for Southern Pine beetle outbreaks.
5289054	southern pine beetle	Dendroctonus frontalis	Lightning strikes can be inciting factors for Southern Pine beetle outbreaks.
5289051	southern pine beetle	Dendroctonus frontalis	Lightning strikes can be inciting factors for Southern Pine beetle outbreaks.
5288074	Ips engraver beetles	Ips spp.
5288071	Ips engraver beetles	Ips spp.
5288065	Ips engraver beetles	Ips spp.
5288066	Ips engraver beetles	Ips spp.
5288067	Ips engraver beetles	Ips spp.
5288069	Ips engraver beetles	Ips spp.
5288064	Ips engraver beetles	Ips spp.
5288059	Ips engraver beetles	Ips spp.	Ips avul & calli in Slash pine
5424289	hemlock borer	Phaenops fulvoguttata	Infested tree. Woodpecker probing has stripped the bark off this infested tree. The reddish inner-bark is very visible against a snowy background. March 2010
2143007	pinyon sawfly	Neodiprion edulicolus	needles after feeding; possibly Neodipriodon edulicolus
5424255	European pine sawfly	Neodiprion sertifer	Classic old-foliage defolaition event by European pine sawfly. New year foliage is undamaged.
5424256	European pine sawfly	Neodiprion sertifer	European pine sawfly defoliation, early spring feeding on previous years needles.
5424259	European pine sawfly	Neodiprion sertifer	Early season defoliation by European pine sawfly on a red pine. Larvae eat only previous-years needles.
2143031	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella; mass opened to show chamber formed by borer; note characteristic frass mixed in pitch
1546115	white pine cone beetle	Conophthorus coniperda
2181023	spruce beetle	Dendroctonus rufipennis
2181030	spruce beetle	Dendroctonus rufipennis	woodpecker damage on infested spruce
2180076	spruce beetle	Dendroctonus rufipennis
1564016	larch casebearer	Coleophora laricella	Damage to larch foliage caused by feeding by larch casebearer
0010092	red oak borer	Enaphalodes rufulus	The bark has been stripped from this red oak so as to show the borer activity occuring. Note the large number of bore holes in the stem.
0010093	red oak borer	Enaphalodes rufulus	This red oak had died and the bark was peeling off the tree.
0010094	red oak borer	Enaphalodes rufulus	This is a cross sectional cut of the bole of a red oak, showing some tunneling and pupal chambers of the borer.
5383236	periodical cicada	Magicicada septendecim	Oak tree in yard with flagging damage
5383254	redheaded pine sawfly	Neodiprion lecontei	Heavy defoliation of longleaf pine
5383259	redheaded pine sawfly	Neodiprion lecontei
2144088	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella
2142099	pinyon needle scale	Matsucoccus acalyptus	defoliated tree
2143029	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella; upper mass opened to show chamber formed by borer
2143030	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella; lower mass opened to show chamber formed by borer
2143032	cone worms	Dioryctria spp.	pinyon pitch mass borer; mass opened to show chamber formed by larva
2143033	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella; upper mass opened to show chamber formed by borer
2143034	cone worms	Dioryctria spp.	pinyon pitch mass borer; likely D.albovittella; upper mass opened to show chamber formed by borer
2143044	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella; branch tips with pitch tubes
2143046	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella
2143047	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella
2143049	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella
2143053	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella
2143054	cone worms	Dioryctria spp.	pinyon tip moth; likely Dioryctria albovittella
2142051	mountain pine beetle	Dendroctonus ponderosae	fading (red) crowns
2142052	mountain pine beetle	Dendroctonus ponderosae	pitch tubes
2142053	mountain pine beetle	Dendroctonus ponderosae	fading crowns; current-year attacks; dwarf mistletoe infections in lower branches
2142054	mountain pine beetle	Dendroctonus ponderosae	pitch-out
1473183	metalic wood-boring beetles	Agrilus spp.	gallery and stain; photo taken 7/1974
1473001	spruce beetle	Dendroctonus rufipennis	crown view of Engelman spruce recently killed by spruce beetle
1411013	southern pine beetle	Dendroctonus frontalis
1411061	southern pine beetle	Dendroctonus frontalis
2912015	cypress aphid	Cinara cupressivora	cypress aphid damage in Kenya
1398169	long-horned beetles		Evidence of tunneling by Cerambycid larva under the bark of a recently killed white spruce
1520084	hemlock woolly adelgid	Adelges tsugae	HWA on hemlock needles
1510035	elm spanworm	Ennomos subsignaria	Elm spanworm defoliation
1510050	balsam woolly adelgid	Adelges piceae	Balsam wooly adelgid killed frazier fir
0355019	spruce gall aphids	Adelges spp.	thinning crowns
1484010	pine webworm	Pococera robustella
5202043	white pine weevil	Pissodes strobi
5202053	white pine weevil	Pissodes strobi	Terminal attack on a jack pine by the white pine weevil; Photo taken in Eau Claire County, Wisconsin
5202058	red pine shoot moth	Dioryctria resinosella	dead red pine shoot killed by a tunneling red pine shoot moth caterpillar.
5202061	red pine shoot moth	Dioryctria resinosella	Dead shoot on red pine, mid-August, central WI; Photo taken in Jackson Co., WI
5202062	fall webworm	Hyphantria cunea	Tent on cherry in mid-September; Dunn Co., WI
1484004	emerald ash borer	Agrilus planipennis	infested tree showing water sprouts or adventitious shoots
5028070	cherry scallop shell moth	Rheumaptera prunivorata	crown damage
5028071	cherry scallop shell moth	Rheumaptera prunivorata	crown damage
2184078	cottonwood leaf beetle	Chrysomela scripta
1479018	yellowheaded spruce sawfly	Pikonema alaskensis	Characteristic feeding damage on a young open-grown white spruce. Photo taken near Park Rapids, Minnesota.
3036098	conifer sawflies	Neodiprion spp.	Dieback from introduced pine sawfly
5042031	twolined chestnut borer	Agrilus bilineatus
5061006	twolined chestnut borer	Agrilus bilineatus
5046015	red oak borer	Enaphalodes rufulus
5054079	jack pine budworm	Choristoneura pinus pinus	mortality
5037066	long-horned beetles	Xylotrechus spp.
2184087	larch sawfly	Pristiphora erichsonii
2185007	European pine sawfly	Neodiprion sertifer
2185029	red pine cone borer	Eucosma monitorana
2185042	northern pitch twig moth	Retinia albicapitana	pitch ball removed
2185043	northern pitch twig moth	Retinia albicapitana
2185046	northern pitch twig moth	Retinia albicapitana
2179052	mountain pine beetle	Dendroctonus ponderosae	2003
2179053	mountain pine beetle	Dendroctonus ponderosae
2184070	larch casebearer	Coleophora laricella
2181049	basswood leafminer	Baliosus nervosa
2181051	basswood leafminer	Baliosus nervosa
2181054	May-June beetles	Phyllophaga spp.
2181061	arborvitae leafminer	Argyresthia thuiella
2181062	aspen leafminer	Phyllocnistis populiella
2181069	palmerworm	Dichomeris ligulella
2181078	basswood leafminer	Baliosus nervosa
2181085	balsam woolly adelgid	Adelges piceae
2181088	black pineleaf scale	Dynaspidiotus californica
2181100	European elm scale	Gossyparia spuria
2182014	pine bark adelgid	Pineus strobi
2182015	pine bark adelgid	Pineus strobi
2182029	Saratoga spittlebug	Aphrophora saratogensis
2182030	Saratoga spittlebug	Aphrophora saratogensis
2182038	white pine weevil	Pissodes strobi
5038045	emerald ash borer	Agrilus planipennis	mortality
5038047	emerald ash borer	Agrilus planipennis	crown dieback
2140083	pinyon ips	Ips confusus
2141041	spruce beetle	Dendroctonus rufipennis	pitch tube
2141043	spruce beetle	Dendroctonus rufipennis	pitch tubes
1468254	spruce spider mite	Oligonychus ununguis
2166052	Sirex woodwasp	Sirex noctilio	close-up of resin beads; characteristic of attack
1468310	sugar pine tortrix	Choristoneura lambertiana	top killed
1468320	western pineshoot borer	Eucosma sonomana
1468350	European pine shoot moth	Rhyacionia buoliana
1468250	larch casebearer	Coleophora laricella
1468163	aspen leafminer	Phyllocnistis populiella	June 9, 1970
1468191	larger boxelder leafroller	Archips negundana
1470150	spruce beetle	Dendroctonus rufipennis	July 1993
1470035	poplar borer	Saperda calcarata	Emergence hole
1470019	poplar gall borer	Saperda inornata
1457016	emerald ash borer	Agrilus planipennis	Emerald ash borer infested ash trees along a street in Novi, MI. Photo taken in August 2002.
3225074	eastern hemlock looper	Lambdina fiscellaria fiscellaria	aerial view
1398187	carpenter ants	Camponotus spp.
1678044	Douglas-fir beetle	Dendroctonus pseudotsugae	sampling of fir beetle in wind throw, Washington
1396013	spruce budworm	Choristoneura fumiferana	defoliation
1396071	carpenter ants	Camponotus spp.
1396088	post oak grasshopper	Dendrotettix quercus
1396091	pine bark adelgid	Pineus strobi
1393001	Asian longhorned beetle	Anoplophora glabripennis	oviposition niche. Ravenswood infestation - Chicago - Aug 1998
1393004	Asian longhorned beetle	Anoplophora glabripennis	Ravenswood infestation - Chicago - Oct 1998
1398035	carpenter ants	Camponotus spp.	Holes from pileated woodpeckers preying on ants.
1394085	southern pine beetle	Dendroctonus frontalis	damage from woodpeckers preying on beetles. Delmarva peninsula
1199033	white pine weevil	Pissodes strobi	Board showing old weevil damage
1361017	southern pine coneworm	Dioryctria amatella	Pitch tube
1301043	emerald ash borer	Agrilus planipennis	Epicormic branches on ash developing after attack.
1241736	cone worms	Dioryctria spp.	Pitch mass under a branch node.
1241630	pinyon needle scale	Matsucoccus acalyptus	Pinon foliage with larvae of pinon leaf scale.
1241632	pinyon needle scale	Matsucoccus acalyptus	Foliage loss and discoloration due to pinon leaf scale.
1241701	cone worms	Dioryctria spp.	Webbed clump of frass and cone discoloration indicating coneworm infestation.
1241705	lodgepole cone beetle	Conophthorus ponderosae	Powdered contents of cone in which cone beetles have developed.
1241571	Douglas-fir needle midge	Contarinia pseudotsugae	Needles infested with Douglas-fir needle midge have swellings or galls which are discolored yellow.
1241572	Douglas-fir needle midge	Contarinia pseudotsugae	Needles infested with Douglas-fir needle midge have swellings or galls which are discolored yellow or red.
1241449	red turpentine beetle	Dendroctonus valens	Large pitch tubes showing attack sites. Attacks are usually confined to lower 3 feet of bole.
1241453	western pine beetle	Dendroctonus brevicomis	Pines with bark flaked away by woodpeckers searching for larvae.
3066038	oak phylloxerids	Phylloxera spp.	leaves curled and deformed on Nuttall oak
1441090	western tent caterpillar	Malacosoma californicum	defoliation to aspen
1441115	aspen leafminer	Phyllocnistis populiella
4060032	bagworm	Thyridopteryx ephemeraeformis
4060077	blackheaded pine sawfly	Neodiprion excitans	oviposition damage
2253030	mountain pine beetle	Dendroctonus ponderosae	cross section of trunk showing blue stain
0014285	cone worms	Dioryctria spp.
1307015	cypress aphid	Cinara cupressivora	in Kenya, Africa
1307068	termites		destroying living trees
1307083	termites		attacking a live tree in Moshi, Tanzania, Africa
1307087	termites		attacking live tree in Moshi, Tanzania, Africa
3047025	Texas leafcutting ant	Atta texana	1:00 PM. See numbers
3047026	Texas leafcutting ant	Atta texana	2:00 PM. See numbers 3047025 & 3047027
3047027	Texas leafcutting ant	Atta texana	12:00 PM. See numbers 304025 & 3047026
4178062	pitch twig moth	Retinia comstockiana	twig gall
3067070	whitefringed beetles	Naupactus spp.	on seedling roots
3066088	scarabs or scarab beetles		and damage to seedlings (taproot chewed off)
3066089	scarabs or scarab beetles		larvae damaged seedling on left; healthy on right
3066060	hawthorn agrilus	Agrilus crataegi	mines on surface of sapwood
3066051	rednecked cane borer	Agrilus ruficollis	infested raspberry canes with typical swellings
3066070	bark beetles
3066072	termites		at seedling nursery in Oklahoma (note entrance holes)
3066073	termites		at seedling nursery in Oklahoma; roots hollowed out causing mortality
3066078	baccharis borer	Oidaematophorus balanotes	long narrow galleries in Baccharis halimifolia L. Baccharis (groundseltree, saltbrush) is a common weed found in the Southern United States on regeneration sites
3066080	baccharis borer	Oidaematophorus balanotes	exit hole and frass in Baccharis in South Carolina
3057084	elm borer	Saperda tridentata	adult emergence hole
3057052	twig girdler	Oncideres cingulata	all major stems girdled
3057076	locust borer	Megacyllene robiniae	and yellow frass at base of tree
3057078	locust twig borer	Ecdytolopha insiticiana	to stem (note twig swelling and entrance openings)
3057080	flatheaded appletree borer	Chrysobothris femorata	sap spot over attack
3056036	persimmon borer	Sannina uroceriformis	entrance in stem
3056037	persimmon borer	Sannina uroceriformis	pupation tubes of frass and silk
3056039	peachtree borer	Synanthedon exitiosa	at the base of young peach tree
3056017	chestnut timberworm	Melittomma sericeum	wormy chestnut lumber
3056005	birch cambium miner	Phytobia betulivora	pith ray flecks in birch lumber
3056006	carpenterworm	Prionoxystus robiniae	worm holes and stain in oak lumber
3056070	sumac stem borer	Oberea ocellata	girdling & oviposition in sumac
3056074	sassafras borer	Oberea ruficollis	in stems
3056075	sassafras borer	Oberea ruficollis	galleries in root and stem
3056079	dogwood twig borer	Oberea tripunctata	series of holes on infested twig
3056026	hickory shoot curculio	Conotrachelus aratus
3056043	indigobush twig borer	Hystricophora taleana	in indigobush
1929102	gypsy moth	Lymantria dispar
0284072	oak stem borer	Aneflomorpha subpubescens	series of holes made in oak seedling
3046015	red oak borer	Enaphalodes rufulus
3046044	scarabs or scarab beetles		damage to seedling
3046045	scarabs or scarab beetles		seedling damage vs. healthy seedling
4178009	southern pine beetle	Dendroctonus frontalis	pitch tube with beetle stuck in pitch. Note boring dust below pitch tube.
2254051	aphids		sooty mold on grand fir
2252078	mountain pine beetle	Dendroctonus ponderosae	close-up of pitch tube
2252082	mountain pine beetle	Dendroctonus ponderosae	pitch tubes on tree trunk
2252088	Douglas-fir beetle	Dendroctonus pseudotsugae	series of entrance holes on tree bole with boring dust visible on bark
2254028	western balsam bark beetle	Dryocoetes confusus	showing red top trees in stand
2254038	larger boxelder leafroller	Archips negundana	defoliation
1678057	white pine weevil	Pissodes strobi	sitka spruce leader killed by weevil
0745061	southern pine beetle	Dendroctonus frontalis	pitch tube and adult
0949008	black turpentine beetle	Dendroctonus terebrans	fan-shaped or D shaped areas under bark; gregarious feeding habit of larvae
0949037	spruce spider mite	Oligonychus ununguis	mites and webbing
3047033	Asian longhorned beetle	Anoplophora glabripennis	exit hole damage
3047036	Asian longhorned beetle	Anoplophora glabripennis	to boards on pallets
4178050	ambrosia beetle	Euplatypus compositus	boring damage and associated staining
3225083	larger pine shoot beetle	Tomicus piniperda	infested tips
1748069	cicadas
1748056	red oak borer	Enaphalodes rufulus
1748057	twig borer
1748058	pine tortoise scale	Toumeyella parvicornis	see also 1748060
1748062	southern pine beetle	Dendroctonus frontalis	in urban interface
1748063	southern pine beetle	Dendroctonus frontalis	pitch tubes
1748018	bagworm	Thyridopteryx ephemeraeformis
1748034	cicadas		flagging
1748051	bagworm	Thyridopteryx ephemeraeformis
1748052	pine reproduction weevil	Cylindrocopturus eatoni	feeding
1748054	cone worms	Dioryctria spp.	pitch mass
1678018	western spruce budworm	Choristoneura freemani	entrance hole in bud
0805067	carpenter ants	Camponotus spp.	damaged timber
0805005	spruce beetle	Dendroctonus rufipennis	frass
0805010	spruce beetle	Dendroctonus rufipennis	woodpecker activity
0590092	southern pine beetle	Dendroctonus frontalis	infestation in urban setting
0488034	bagworm	Thyridopteryx ephemeraeformis
0488061	carpenterworm	Prionoxystus robiniae	typical entrance wound
0590060	eastern tent caterpillar	Malacosoma americanum	complete defoliation, note tents in crotches of tree
0590065	spider mites
0284063	Columbian timber beetle	Corthylus columbianus	Sap-soaked area around gallery as indicated by dry granualar borings below 2.0mm diameter entrance hole.