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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
1593057	eastern dwarf mistletoe	Arceuthobium pusillum	witches' brooms inblack spruce trees along the edge of a dwarf misteltoe "pocket".
1593058	eastern dwarf mistletoe	Arceuthobium pusillum	Dwarf mistletoe infected black spruce stand, northern MN
1593049	pine bark adelgid	Pineus strobi	Main stem coated with cottony-like pine bark adelgids.
5468244	garlic mustard	Alliaria petiolata	large patch of flowering garlic mustard
5468246	garlic mustard	Alliaria petiolata
5468249	garlic mustard	Alliaria petiolata	Large patch of flowering garlic mustard
5468250	garlic mustard	Alliaria petiolata	Large patch of flowering garlic mustard
5468248	garlic mustard	Alliaria petiolata	large patch of flowering garlic mustard
5468241	garlic mustard	Alliaria petiolata	carpet of seedling garlic mustard plants
5468242	garlic mustard	Alliaria petiolata	carpet of seedling garlic mustard plants
1207028	fir engraver	Scolytus ventralis	Close-up view of bole showing infestation in Goodman Ridge area, Walla Walla Ranger District, 1976
1748047	hemlock woolly adelgid	Adelges tsugae
1929094	gypsy moth	Lymantria dispar	Selective summer defoliation of trees
1929098	gypsy moth	Lymantria dispar	Extensive summer defoliation
1468080	pinyon ips	Ips confusus
1468076	pinyon ips	Ips confusus
1467058	mountain pine beetle	Dendroctonus ponderosae
0002156	kudzu	Pueraria montana var. lobata	Kudzu kills trees by shading them and spreads inexorably, mostly through soil movement and vegetative growth
1468283	white fir needleminer	Epinotia meritana
1467412	white pine blister rust	Cronartium ribicola
1470174	spruce beetle	Dendroctonus rufipennis
1470166	Douglas-fir beetle	Dendroctonus pseudotsugae
1470197	fall cankerworm	Alsophila pometaria
1748046	hemlock woolly adelgid	Adelges tsugae
1468084	fir engraver	Scolytus ventralis
1468171	aspen leafminer	Phyllocnistis populiella	August 13, 1969
1468377	fir engraver	Scolytus ventralis	August 1993
1467329	western dwarf mistletoe	Arceuthobium campylopodum
1467126	dwarf mistletoes	Arceuthobium spp.
1467116	dwarf mistletoes	Arceuthobium spp.
1467127	dwarf mistletoes	Arceuthobium spp.
1467326	Douglas-fir dwarf mistletoe	Arceuthobium douglasii
1468260	pine needle scale	Chionaspis pinifoliae
2254003	larch casebearer	Coleophora laricella	stand level feeding damage
2254013	cooley spruce gall adelgid	Adelges cooleyi	aphid mass covered with white waxy coating,
2253068	balsam woolly adelgid	Adelges piceae	note white appearance on tree bole
2252064	pine needle scale	Chionaspis pinifoliae	on Mugo pine
2251090	laminated root disease	Phellinus weirii	yellow shrubs filling gaps caused by conifer mortality
2251056	lodgepole pine needle cast	Lophodermella concolor	older stand with injury
2251057	lodgepole pine needle cast	Lophodermella concolor	young stand in foreground with injury
2250094	white pine blister rust	Cronartium ribicola	infested stand
2250022	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	multi-aged stand with developing infection
2250016	larch dwarf mistletoe	Arceuthobium laricis	infected larch
2250019	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	on Douglas-fir
2250020	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	on Douglas-fir (dead tree)
2250005	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	on Douglas-fir
0976067	dwarf mistletoes	Arceuthobium spp.	in a large tree
0976070	dwarf mistletoes	Arceuthobium spp.	flagging
0976069	dwarf mistletoes	Arceuthobium spp.	large brooms; Wenatchee National Forest
0806068	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	Malheur National Forest, northeastern Oregon
0805052	spruce gall aphids	Adelges spp.	on spruce
0805053	giant conifer aphids	Cinara spp.	aphids on spruce
0805011	northern spruce engraver	Ips perturbatus	white spruce mortality
0795079	kermes scales	Kermes spp.
0795083	white pine aphid	Cinara strobi
0745093	southern pine beetle	Dendroctonus frontalis	early stage of spot
0745084	Ips engraver beetles	Ips spp.	aerial showing damage initating from stored pulpwood
0745055	southern pine beetle	Dendroctonus frontalis	view of spot
1406064	pine needle cast	Lophodermium pinastri	winter burn and Lophodermium on 40,000 Northern Christmas trees, Holman Farm
1398221	pine bark adelgid	Pineus strobi	White coated bark on a pole-sized white pine. Waushara County, WI
1398245	forest tent caterpillar	Malacosoma disstria
1398246	forest tent caterpillar	Malacosoma disstria	Aspen defoliation along a lakeshore, northern MN.
1748049	hemlock woolly adelgid	Adelges tsugae
1468136	cottonwood leafminers	Bucculatrix spp.
1468141	aphids
0016262	kudzu	Pueraria montana var. lobata	typical kudzu
1400077	purple loosestrife	Lythrum salicaria	Southeast Minnesota, September
1467378	Medusa needle blight	Davisomycella medusa
1468213	western spruce budworm	Choristoneura freemani	September 1978
5433040	kudzu	Pueraria montana var. lobata
5433041	kudzu	Pueraria montana var. lobata
5433042	kudzu	Pueraria montana var. lobata
1199030	pine bark adelgid	Pineus strobi
1199029	pine bark adelgid	Pineus strobi	Pine bark adelgid infestation on the bark of an eastern white pine
1199031	beech scale	Cryptococcus fagisuga
1470195	cottony maple scale	Pulvinaria innumerabilis
1441131	oystershell scale	Lepidosaphes ulmi
1241748	balsam woolly adelgid	Adelges piceae
1468270	balsam woolly adelgid	Adelges piceae
0016102	oriental bittersweet	Celastrus orbiculatus	fruiting infestation in winter with Dr. Harvey Holt, Purdue University
0016151	cogongrass	Imperata cylindrica	dormant phase of roadside infestation in January
0016225	Chinese wisteria	Wisteria sinensis
0016263	kudzu	Pueraria montana var. lobata	field crew with invading kudzu
1470196	tuliptree scale	Toumeyella liriodendri
1400074	purple loosestrife	Lythrum salicaria	Southeast Minnesota, September.
3046049	kermes scales	Kermes spp.
0016198	Chinese wisteria	Wisteria sinensis	invading pine stand
2132021	shrubby lespedeza	Lespedeza bicolor
1398224	pine bark adelgid	Pineus strobi	Whitewashed appearance on a heavily infested stem. Waushara County, Wisconsin
1398223	pine bark adelgid	Pineus strobi	White cottony masses on the bark
1400073	purple loosestrife	Lythrum salicaria	Southeast Minnesota, September
2307240	sericea lespedeza	Lespedeza cuneata	September
1468142	soft scales	Toumeyella spp.
2109072	leafcurl ash aphid	Meliarhizophagus fraxinifolii	Wooly ash aphids on underside of curled American ash leaf (Frazinus americana). The aphid colony has been largely parasitized by Aphelinus sp. Note the black aphid "mummies."
3056024	oak lecanium	Parthenolecanium quercifex
1196251	common hempnettle	Galeopsis tetrahit
1196209	true forget-me-not	Myosotis scorpioides	Roadside infestation
2307095	Amur honeysuckle	Lonicera maackii	December
0016131	big periwinkle	Vinca major	in April
1196025	bouncingbet	Saponaria officinalis
1467108	Douglas-fir dwarf mistletoe	Arceuthobium douglasii
1196040	true forget-me-not	Myosotis scorpioides	In ditch, note blue flowers
2307216	golden bamboo	Phyllostachys aurea	July
1441128	pine needle scale	Chionaspis pinifoliae	White female adult scales; eggs overwintering under adult scales
2307162	kudzu	Pueraria montana var. lobata	April
0016078	Amur honeysuckle	Lonicera maackii	Located in nature preserve within a hardwood stand in December
0016142	giant reed	Arundo donax	along roadside in July
2307222	Japanese climbing fern	Lygodium japonicum	July
1441130	oystershell scale	Lepidosaphes ulmi
0806089	yellow toadflax	Linaria vulgaris	Pikes Peak Ranger District, Pike National Forest, south-central Colorado
1468144	black pineleaf scale	Dynaspidiotus californica
2250090	white pine blister rust	Cronartium ribicola	infested stand
1624049	broomleaf toadflax	Linaria genistifolia	Introduced from southeastern Europe as an ornamental, outcompetes native plant species in the western United States.
1196063	meadow hawkweed	Hieracium caespitosum	Roadside infestation
0016167	Chinese silvergrass	Miscanthus sinensis	October near Ashville
0016221	Japanese stiltgrass	Microstegium vimineum	Dead along river
0795076	balsam woolly adelgid	Adelges piceae
1669043	tuliptree scale	Toumeyella liriodendri	on tulip poplar showing adults and crawlers
1196064	meadow hawkweed	Hieracium caespitosum	Roadside infestation
0016123	kudzu	Pueraria montana var. lobata	old infestation draped on killed trees in July
1196248	common tansy	Tanacetum vulgare
0016097	oriental bittersweet	Celastrus orbiculatus	Specimen with immature fruit in October.
1196261	alsike clover	Trifolium hybridum
0016224	cogongrass	Imperata cylindrica	along Interstate 65
0364060	kudzu	Pueraria montana var. lobata	covering house
1196167	orange hawkweed	Hieracium aurantiacum
2307167	kudzu	Pueraria montana var. lobata	July
1468145	spittlebugs or froghoppers
2307198	cogongrass	Imperata cylindrica	September
1276001	hemlock woolly adelgid	Adelges tsugae	Ovisacs on the underside of a branch
1587167	cooley spruce gall adelgid	Adelges cooleyi
1196042	reed canarygrass	Phalaris arundinacea	Growing as an emergent plant
1398217	black pineleaf scale	Dynaspidiotus californica	Mugo pine needles infested with black pineleaf scales. Photo taken in Moundsview MN, stressed ornamental mugo pine.
0488049	balsam woolly adelgid	Adelges piceae
1441129	pine needle scale	Chionaspis pinifoliae
2307212	Chinese silvergrass	Miscanthus sinensis	October
0016126	kudzu	Pueraria montana var. lobata	with spring regrowth in April
1196065	meadow hawkweed	Hieracium caespitosum
1196003	bouncingbet	Saponaria officinalis
1748037	balsam woolly adelgid	Adelges piceae
2307124	oriental bittersweet	Celastrus orbiculatus	December
0795084	pine bark adelgid	Pineus strobi	on white pine
1241633	pine needle scale	Chionaspis pinifoliae
1196066	orange hawkweed	Hieracium aurantiacum
1196112	Japanese knotweed	Fallopia japonica	Patch is over 100 m long and up to 15 m wide.
9005062	Chinese silvergrass	Miscanthus sinensis	in November
9005072	English ivy	Hedera helix	on ground in July
1196210	true forget-me-not	Myosotis scorpioides	Roadside infestation
9005081	oriental bittersweet	Celastrus orbiculatus	vines in tree in October
2307077	Chinese privet	Ligustrum sinense	April
2253069	balsam woolly adelgid	Adelges piceae	note characteristic white of tree bole
9005065	cogongrass	Imperata cylindrica	in September
9005073	English ivy	Hedera helix	on tree in June
1196118	Japanese knotweed	Fallopia japonica
2132019	alligatorweed	Alternanthera philoxeroides
1467331	western dwarf mistletoe	Arceuthobium campylopodum
0590100	balsam woolly adelgid	Adelges piceae	stand mortality at Mt. Mitchell
1196168	orange hawkweed	Hieracium aurantiacum
1196176	yellow toadflax	Linaria vulgaris
1468412	Ips engraver beetles	Ips spp.	bad slash disposal
1468271	oystershell scale	Lepidosaphes ulmi
1196035	Japanese knotweed	Fallopia japonica
0590098	balsam woolly adelgid	Adelges piceae	stand mortality at Mt. Mitchell
1467379	Medusa needle blight	Davisomycella medusa
1587179	spruce spider mite	Oligonychus ununguis
1587178	spruce spider mite	Oligonychus ununguis
1587165	hemlock woolly adelgid	Adelges tsugae	Hemlock woolly adelgids on containerized western hemlock seed orchard in greenhouse
1587164	giant conifer aphids	Cinara spp.	, Colony of giant conifer aphids on grand fir
1587151	silverspotted tiger moth	Lophocampa argentata
0745009	southern pine beetle	Dendroctonus frontalis	view of spot
1468362	western balsam bark beetle	Dryocoetes confusus
1468139	twig beetles	Pityophthorus spp.
1467385	white pine needlecast	Lophodermella arcuata
1468405	mountain pine beetle	Dendroctonus ponderosae
0355015	hemlock woolly adelgid	Adelges tsugae
1196186	reed canarygrass	Phalaris arundinacea
1196190	reed canarygrass	Phalaris arundinacea
1398051	beech scale	Cryptococcus fagisuga	Trunk covered with scale. Michigan's upper peninsula, 2004.
1196184	yellow sweetclover	Melilotus officinalis
2307126	oriental bittersweet	Celastrus orbiculatus	October
1398049	beech scale	Cryptococcus fagisuga	Beech scale covering the bark of a larger American beech. Upper Peninsula of Michigan, 2002
1383040	flixweed	Descurainia sophia
1383039	flixweed	Descurainia sophia
0355021	southern pine beetle	Dendroctonus frontalis	infestation moving from right to left, note yellow faders on left
1468001	Douglas-fir tussock moth	Orgyia pseudotsugata	defoliated grand fir
1196041	reed canarygrass	Phalaris arundinacea	Growing as an emergent plant.
1394067	oak leaftier	Croesia semipurpurana	defoliation
1468094	Douglas-fir beetle	Dendroctonus pseudotsugae
1196051	true forget-me-not	Myosotis scorpioides
1383021	cheatgrass	Bromus tectorum
1467055	mountain pine beetle	Dendroctonus ponderosae
1467392	needle cast	Virgella robusta
1468409	spruce beetle	Dendroctonus rufipennis
1467112	dwarf mistletoes	Arceuthobium spp.
1929091	gypsy moth	Lymantria dispar	defoliation in urban area
3057039	forest tent caterpillar	Malacosoma disstria	defoliation [figure 6B in USDA Forest Service Oak Pests book]
1468039	Douglas-fir tussock moth	Orgyia pseudotsugata	1964
1196067	orange hawkweed	Hieracium aurantiacum
2307225	Japanese climbing fern	Lygodium japonicum	July
1468218	Douglas-fir beetle	Dendroctonus pseudotsugae
1467110	Douglas-fir dwarf mistletoe	Arceuthobium douglasii
2253020	balsam woolly adelgid	Adelges piceae
1120421	kudzu	Pueraria montana var. lobata	July. Photo from Forest Plants of the Southeast and Their Wildlife Uses by J.H. Miller and K.V. Miller, published by The University of Georgia Press in cooperation with the Southern Weed Science Society.
1748036	balsam woolly adelgid	Adelges piceae
1118269	bottomland hardwoods
0805055	spruce bud scale	Physokermes piceae	scales on white spruce
0016080	Amur honeysuckle	Lonicera maackii	along railroad right-of-way in December
0949050	pine needle scale	Chionaspis pinifoliae
0016252	kudzu	Pueraria montana var. lobata	invading the Talladega National Forest sign
1468098	spruce beetle	Dendroctonus rufipennis	Manti-LaSal National Forest, Utah
1196276	bird vetch	Vicia cracca	Climbing into trees
1467376	Rhabdocline needlecast	Rhabdocline weirii
1748043	balsam woolly adelgid	Adelges piceae
1468125	white fir needleminer	Epinotia meritana
0795032	elm spanworm	Ennomos subsignaria	aerial view of defoliation of oak
1468401	mountain pine beetle	Dendroctonus ponderosae
1374621	musk thistle	Carduus nutans	Plants in fall
5424246	Eriophyid mites	Eriophyes spp.	Felt-like leaf gall on river birch caused by a eriophyid mite, genus Eriophyes.
5053062	beech scale	Cryptococcus fagisuga	Heavy infestation of Cryptococcus fagisuga scale on American beech
5422035	tall fescue	Festuca arundinacea
5422109	pasmo disease of linseed	Mycosphaerella linicola
5422110	cogongrass	Imperata cylindrica
5422034	kudzu	Pueraria montana
5422038	Amur honeysuckle	Lonicera maackii
5422026	weeping lovegrass	Eragrostis curvula	In February
5422023	johnsongrass	Sorghum halepense
5422016	Cherokee rose	Rosa laevigata	In April
5421995	Japanese stiltgrass	Microstegium vimineum	In December
5421994	kudzu	Pueraria montana	In July
5422005	sericea lespedeza	Lespedeza cuneata	In September
5421989	johnsongrass	Sorghum halepense	In July
5421982	English ivy	Hedera helix	In September
5421976	Chinese silvergrass	Miscanthus sinensis	In October
5421974	golden bamboo	Phyllostachys aurea	In December
5421966	air-potato	Dioscorea bulbifera	In October
5421949	Japanese spiraea	Spiraea japonica	in September
5421948	Japanese knotweed	Fallopia japonica	In November
5421942	Japanese knotweed	Fallopia japonica	In July
5421927	coral ardisia	Ardisia crenata	In February
2180072	spruce beetle	Dendroctonus rufipennis
2180073	spruce beetle	Dendroctonus rufipennis
2180075	spruce beetle	Dendroctonus rufipennis
2180091	spruce beetle	Dendroctonus rufipennis
2181028	spruce beetle	Dendroctonus rufipennis
5252056	pine engraver	Ips pini	Red pine mortality caused by drought and Ips pini
5252057	pine engraver	Ips pini	Red pine mortality caused by drought and Ips pini
5052068	Scleroderris canker of pine and spruce	Gremmeniella abietina	European strain of G. abietina symptoms on red pine.
5048083	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5048065	beech scale	Cryptococcus fagisuga	Cottony coverings of Cryptococcus fagisuga, the beech scale.
5048075	beech bark disease	Nectria coccinea	with Cryptococcus fagisuga on the trunk of an American beech.
5048076	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5048079	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5048095	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5048087	beech bark disease	Nectria coccinea	Cryptococcus fagisuga on American beech, with tarry spots.
5048086	beech scale	Cryptococcus fagisuga	Beech bark disease. A severe infestation of Cryptococcus fagisuga in Ludington State Park, MI.
5048096	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5048097	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5049001	beech scale	Cryptococcus fagisuga	Cryptococcus fagisuga on American beech.
5043084	sudden oak death	Phytophthora ramorum	site of extensive ramorum canker on oak.
5043087	sudden oak death	Phytophthora ramorum	Sudden oak death (ramorum canker) symptoms on coast live oak
5389829	honey bee	Apis mellifera	Honeybee infestation in a living room ceiling - picture taken prior to opening up. This photo shows owner's futile attempt at sealing off the bees from the interior of the home.
5033029	eastern dwarf mistletoe	Arceuthobium pusillum	Dwarf mistletoe on black spruce in northern Minnesota
5033030	eastern dwarf mistletoe	Arceuthobium pusillum	A large dwarf mistletoe broom on black spruce in a northern Minnesota bog.
5033031	eastern dwarf mistletoe	Arceuthobium pusillum	Dwarf mistletoe on black spruce in a northern Minnesota bog.
5033032	eastern dwarf mistletoe	Arceuthobium pusillum	A large dwarf mistletoe broom on black spruce in a northern Minnesota bog.
5033034	eastern dwarf mistletoe	Arceuthobium pusillum	A group of black spruce infected with dwarf mistletoe in a Minnesota bog.
5033035	eastern dwarf mistletoe	Arceuthobium pusillum	Black spruce infected with dwarf mistletoe in a Minnesota bog.
1467334	ponderosa pine dwarf mistletoe	Arceuthobium vaginatum
1196105	ornamental jewelweed	Impatiens glandulifera
1196161	orange hawkweed	Hieracium aurantiacum	fruiting
5379599	peppervine	Ampelopsis arborea	June
5379578	monkeygrass	Liriope muscari	September
5379576	monkeygrass	Liriope muscari	August
5379575	monkeygrass	Liriope muscari	August
5379565	johnsongrass	Sorghum halepense	July
5379526	crownvetch	Securigera varia
5379527	crownvetch	Securigera varia	June
5379595	Amur peppervine	Ampelopsis brevipedunculata
5379589	Amur peppervine	Ampelopsis brevipedunculata	Infestation in June
1473121	fir dwarf mistletoe	Arceuthobium abietinum
5379491	alligatorweed	Alternanthera philoxeroides	Alligator weed and pampasgrass (Cortaderia jubata) infestation.
5379490	alligatorweed	Alternanthera philoxeroides	Alligator weed and pampasgrass (Cortaderia jubata) infestation.
5379489	alligatorweed	Alternanthera philoxeroides
5379488	alligatorweed	Alternanthera philoxeroides
1473118	pineland dwarf mistletoe	Arceuthobium vaginatum ssp. cryptopodum	Infestation center from tree top
1473139	American dwarf mistletoe	Arceuthobium americanum	taken in 1965 at "King's Canyon" state unknown
5369975	garlic mustard	Alliaria petiolata	Invasive plant, photo taken in Ramsey Co., MN
5369976	garlic mustard	Alliaria petiolata	Invasive plant, photo taken in Ramsey Co., MN
1473122	fir dwarf mistletoe	Arceuthobium abietinum	7/1/1964
1473260	pine needle cast	Lophodermella cerina	Lophodermella cerina center in ponderosa; NM, Lincoln Co., Mescalero Apache IR, Upper Fence Canyon
5029019	eastern dwarf mistletoe	Arceuthobium pusillum	Witch's brooms of eastern spruce dwarf mistletoe.
2143001	pinyon needle scale	Matsucoccus acalyptus
2142094	pine needle scale	Chionaspis pinifoliae	infested branch
2143002	pinyon needle scale	Matsucoccus acalyptus
2142082	pinyon dwarf mistletoe	Arceuthobium divaricatum	living tree with heavy brooming
1473128	fir dwarf mistletoe	Arceuthobium abietinum	midget infestation: infection is young, first year shoot formation; 4/1/1964
1473034	American dwarf mistletoe	Arceuthobium americanum	infestation on ridge
1473072	Cenangium cankers	Cenangium spp.	infected mature stand
1473120	limber pine dwarf mistletoe	Arceuthobium cyanocarpum	pigmy forest of infested limber pine; 9/1/1964
1473026	American dwarf mistletoe	Arceuthobium americanum	bole infestation
1539025	alligatorweed	Alternanthera philoxeroides
1539043	Japanese knotweed	Fallopia japonica
1473200	pine needle cast	Lophodermella cerina	close up of original infection center from intersection of Walken and Snowdrift Roads
1473255	pine needle cast	Lophodermella cerina
1473256	pine needle cast	Lophodermella cerina	moderate infection
1473257	pine needle cast	Lophodermella cerina	heavy infection
1473258	pine needle cast	Lophodermella cerina	heavy infection
1473259	pine needle cast	Lophodermella cerina
4166020	cochineal insect	Dactylopius coccus	scale insect on prickly pear used to make red dye-red; carmine dye; cochineal dye; Same dye used in the british red coats;
1411007	southern pine beetle	Dendroctonus frontalis
1411011	southern pine beetle	Dendroctonus frontalis
1411012	southern pine beetle	Dendroctonus frontalis
1411017	southern pine beetle	Dendroctonus frontalis
1411018	southern pine beetle	Dendroctonus frontalis	stood dead for years due to lack of other borers;
1411028	southern pine beetle	Dendroctonus frontalis
1411005	southern pine beetle	Dendroctonus frontalis
1411006	southern pine beetle	Dendroctonus frontalis
1411037	southern pine beetle	Dendroctonus frontalis
5289007	orangestriped oakworm	Anisota senatoria
1398262	birch leafminer	Fenusa pusilla	A heavily infested landscape tree
1520082	hemlock woolly adelgid	Adelges tsugae
1520083	hemlock woolly adelgid	Adelges tsugae	HWA on hemlock needles
1520104	fusiform rust	Cronartium quercuum f.sp. fusiforme	Fusiform rust in a nursery bed
1520110	southern pine beetle	Dendroctonus frontalis	SPB attack on hillside
1520111	southern pine beetle	Dendroctonus frontalis	Large SPB spot from the air
1520112	southern pine beetle	Dendroctonus frontalis
1519032	kudzu	Pueraria montana var. lobata
1520081	hemlock woolly adelgid	Adelges tsugae
1509100	oak wilt	Ceratocystis fagacearum	Oak wilt
1510001	southern pine beetle	Dendroctonus frontalis	Southern pine beetle spot - small
1510002	southern pine beetle	Dendroctonus frontalis	Southern pine beetle spot - massive
1510003	southern pine beetle	Dendroctonus frontalis	Southern pine beetle spot
1510012	forest tent caterpillar	Malacosoma disstria	Forest tent caterpillar defoliation
1510013	forest tent caterpillar	Malacosoma disstria	Forest tent caterpillar defoliation
1510014	forest tent caterpillar	Malacosoma disstria	Forest tent caterpillar defoliation
1510039	locust leafminer	Odontota dorsalis	Locust leaf miner damage (landscape scale)
1510053	balsam woolly adelgid	Adelges piceae	Balsam wooly adelgid infested fir bole
1510094	southern pine beetle	Dendroctonus frontalis	Aerial shot of an SPB spot
1509001	oriental bittersweet	Celastrus orbiculatus	Oriental bittersweet; covering roadside trees; Asheville area
1509002	oriental bittersweet	Celastrus orbiculatus	Oriental bittersweet; covering edge trees; Asheville area
1509003	oriental bittersweet	Celastrus orbiculatus	Oriental bittersweet; growing over trees; Asheville area
1509006	oriental bittersweet	Celastrus orbiculatus	Oriental bittersweet; growing up tree bole; Asheville area
1507064	southern pine beetle	Dendroctonus frontalis	SPB active spot;
1507065	southern pine beetle	Dendroctonus frontalis	SPB multi-acre spot
1510086	balsam woolly adelgid	Adelges piceae	Balsam wooly adelgid caused mortality
1510091	southern pine beetle	Dendroctonus frontalis	SPB spot from air
1517011	southern pine beetle	Dendroctonus frontalis	Southern pine beetle; aerial view
1504036	dodder	Cuscuta spp.	Dodder; sunflower
1501054	oak wilt	Ceratocystis fagacearum	Oak wilt center
1501055	oak wilt	Ceratocystis fagacearum	Oak wilt center, Kerrville State Park
1502060	annosum root disease	Heterobasidion annosum	Annosus root rot; infection center
1504003	palm lethal yellowing	Candidatus Phytoplasma palmae PLY	Lethal yellows; infected palm stand
1501022	pitch canker	Fusarium subglutinans	Pitch canker, slash pine terminals
1501025	pitch canker	Fusarium subglutinans	Pitch canker, slash pine terminals
1501014	pitch canker	Fusarium subglutinans	Pitch canker incidence (red flags), slash pine
2254044	cooley spruce gall adelgid	Adelges cooleyi
5028096	Cytospora canker of spruce	Valsa kunzei	Cankers cause branch mortality, and can eventually result in the death of the tree.
5028097	Cytospora canker of spruce	Valsa kunzei	Infections usually start low in the tree, adn progress upward through the crown.
5028098	Cytospora canker of spruce	Valsa kunzei	Blue spruce in landscape with multiple branch cankers.
1479007	jack pine budworm	Choristoneura pinus pinus	Characteristic top-kill and mortality in jack pine following a jack pine budworm outbreak. Photo taken on the Chequamegon National Forest, northwest Wisconsin.
3036033	oak wilt	Ceratocystis fagacearum	oak wilt at edge of woodland St. Paul, MN
1441145	mountain pine beetle	Dendroctonus ponderosae	Reshoot #2 Bear Mountain Basin looking at Northwest MPB Veiw NW MIDDLE
1441146	mountain pine beetle	Dendroctonus ponderosae	Reshoot #2 Bear Mountain Basin looking North BLKH MPB July 24,92 RIGHT
1441147	mountain pine beetle	Dendroctonus ponderosae	Bear Mountain Basin Before ( Winter 92)
1441148	mountain pine beetle	Dendroctonus ponderosae	Bear Mountain Basin BLKH mpb Feb 1992
1441149	mountain pine beetle	Dendroctonus ponderosae	15 July 1992 retake #1 Bear Mountain BLKH MPB -moth faders
1441153	mountain pine beetle	Dendroctonus ponderosae	15 July 1992 Bear Mountain Basin Right of three NW view
1441142	mountain pine beetle	Dendroctonus ponderosae	North West toward Spring Creek MPB on BL/KH Feb1992 MIDDLE
1441143	mountain pine beetle	Dendroctonus ponderosae	N-NE Bear Mountain Basin, BLKH MPB RIGHT
5042014	eastern arborvitae	Thuja occidentalis
5042015	eastern arborvitae	Thuja occidentalis
5042016	eastern arborvitae	Thuja occidentalis
5053077	annosum root disease	Heterobasidion annosum
5057058	white heartwood rot	Phellinus tremulae
5050024	cooley spruce gall adelgid	Adelges cooleyi
5050025	cooley spruce gall adelgid	Adelges cooleyi
5050026	cooley spruce gall adelgid	Adelges cooleyi
5050027	cooley spruce gall adelgid	Adelges cooleyi
5038032	Cytospora cankers	Cytospora spp.
5038033	Cytospora cankers	Cytospora spp.
2179061	Douglas-fir beetle	Dendroctonus pseudotsugae
2179062	Douglas-fir beetle	Dendroctonus pseudotsugae
2179099	Douglas-fir beetle	Dendroctonus pseudotsugae	infrared image; compare to image 2179061
2180010	Jeffery pine beetle	Dendroctonus jeffreyi
2181021	spruce beetle	Dendroctonus rufipennis
2181022	spruce beetle	Dendroctonus rufipennis
2183085	oystershell scale	Lepidosaphes ulmi
2183091	pine needle scale	Chionaspis pinifoliae
2183092	pine needle scale	Chionaspis pinifoliae
2183093	pine tortoise scale	Toumeyella parvicornis	with crawlers in display case
2181029	spruce beetle	Dendroctonus rufipennis
2181087	black pineleaf scale	Dynaspidiotus californica
2181094	cottony maple scale	Pulvinaria innumerabilis
2182007	European fruit lecanium	Parthenolecanium corni
2182022	pine tortoise scale	Toumeyella parvicornis
2182032	spruce gall adelgid	Pineus similis
2139086	mountain pine beetle	Dendroctonus ponderosae	stand mortality
2139077	fir engraver	Scolytus ventralis
3225033	southern pine beetle	Dendroctonus frontalis	aerial view of spot with direction of movement indicated
1929084	gypsy moth	Lymantria dispar	Summer defoliation of hardwoods
2912081	gypsy moth	Lymantria dispar
1207039	larch casebearer	Coleophora laricella	larch defoliated by casebearer near the junction of the Mt. Emily road and interstate 84.
1212097	white satin moth	Leucoma salicis	Elk Flat, Walla Walla RD, Umatilla NF
1212098	white satin moth	Leucoma salicis	Distant view of forest damaged by satin-moth defoliation; Elk Flat, Walla Walla RD, Umatilla NF
1212099	white satin moth	Leucoma salicis	Close-up view of stand with defoliation; Elk Flat, Walla Walla RD, Umatilla NF
1241501	juniper mistletoe	Phoradendron juniperinum	Plants as they appear in the crown of a juniper.
1467018	black stain root disease	Ophiostoma wageneri
1467041	pine needle cast	Lophodermium pinastri
1467104	dwarf mistletoes	Arceuthobium spp.	killed by beetles and mistletoe infested
1467111	dwarf mistletoes	Arceuthobium spp.	June 1978
1467114	dwarf mistletoes	Arceuthobium spp.
1467115	dwarf mistletoes	Arceuthobium spp.
1467137	Cytospora canker of fir	Cytospora abietis	heavily infested limbs killed
1467316	mistletoes	Phoradendron spp.
1467320	mistletoes	Phoradendron spp.
1467109	dwarf mistletoes	Arceuthobium spp.
1468376	fir engraver	Scolytus ventralis	August 1993
1467377	Medusa needle blight	Davisomycella medusa
1467322	mistletoes	Phoradendron spp.
1467323	mistletoes	Phoradendron spp.
1467337	limber pine dwarf mistletoe	Arceuthobium cyanocarpum
1467342	Digger pine dwarf mistletoe	Arceuthobium occidentale
1467359	red fir dwarf mistletoe	Arceuthobium abietinum f.sp. magnificae
1467364	Elytroderma needle cast of pine	Elytroderma deformans
1467380	Medusa needle blight	Davisomycella medusa
1467414	white pine blister rust	Cronartium ribicola	alternate host
1467450	white pine blister rust	Cronartium ribicola	high mortality
1467452	mountain pine beetle	Dendroctonus ponderosae
1467453	mountain pine beetle	Dendroctonus ponderosae
1467454	mountain pine beetle	Dendroctonus ponderosae
1118270	bottomland hardwoods
1118272	bottomland hardwoods
1118285	bottomland hardwoods		Bottomland hardwoods alongside southern pines
1470060	true fir bark beetles	Scolytus spp.
1470061	true fir bark beetles	Scolytus spp.
1468079	pinyon ips	Ips confusus
1468332	autumn moth	Epirrita autumnata
1468263	cooley spruce gall adelgid	Adelges cooleyi
1470173	spruce beetle	Dendroctonus rufipennis
1468410	spruce beetle	Dendroctonus rufipennis
1468402	mountain pine beetle	Dendroctonus ponderosae
1468403	mountain pine beetle	Dendroctonus ponderosae
1468406	spruce beetle	Dendroctonus rufipennis
1468413	Arizona fivespined ips	Ips lecontei	group killing
1468415	Ips engraver beetles	Ips spp.	October 11, 1966
1468404	mountain pine beetle	Dendroctonus ponderosae	nearly all mature trees killed; Early 1930's
1468337	Geometrid moth	Lambdina vitraria
1468358	pine tube moth	Argyrotaenia pinatubana
1468331	western hemlock looper	Lambdina fiscellaria lugubrosa
1468269	bean aphid	Aphis fabae
1468262	black pineleaf scale	Dynaspidiotus californica	1971
1468180	cochineal scale	Dactylopius confusus
1468151	imported willow leaf beetle	Plagiodera versicolora
1468166	aspen leafminer	Phyllocnistis populiella	1958
1468220	Douglas-fir beetle	Dendroctonus pseudotsugae
1468128	white fir needleminer	Epinotia meritana	June 10, 1970
1468056	spruce beetle	Dendroctonus rufipennis	early 1920's
1468057	spruce beetle	Dendroctonus rufipennis	1992
1468065	mountain pine beetle	Dendroctonus ponderosae
1468073	pinyon needle scale	Matsucoccus acalyptus	1970
1468050	pine butterfly	Neophasia menapia	October 1953
1468024	Marssonina leaf spot	Marssonina tremulae
1468025	Marssonina leaf spot	Marssonina tremulae
1468004	spruce beetle	Dendroctonus rufipennis	1972 outbreak
1468009	dwarf mistletoes	Arceuthobium spp.
1470142	spruce beetle	Dendroctonus rufipennis	infested logs
1470144	spruce beetle	Dendroctonus rufipennis	1992
1470145	spruce beetle	Dendroctonus rufipennis
1470167	Douglas-fir pole beetle	Pseudohylesinus nebulosus
1470171	mountain pine beetle	Dendroctonus ponderosae
1470113	horned oak gall	Callirhytis cornigera
1470132	pine wilt nematode	Bursaphelenchus xylophilus	pine stump; blue stain fungus also present
1470043	spruce beetle	Dendroctonus rufipennis
1470049	spruce budworm	Choristoneura fumiferana
1470010	jack pine budworm	Choristoneura pinus pinus	Defoliation in 1984
2132025	Chinese tallowtree	Triadica sebifera	Tallow tree, privet, mimosa, and cogongrass infestation
1398110	Asian longhorned beetle	Anoplophora glabripennis
1396125	spruce spider mite	Oligonychus ununguis
1396146	chestnut blight or canker	Cryphonectria parasitica	dead tree, picture taken 1943
1393007	Asian longhorned beetle	Anoplophora glabripennis	Street before infested trees were removed. See image#1393008 for picture of street after infested trees were removed. Ravenswood infestation - Chicago - Oct 1998
1394077	pine leaf adelgid	Pineus pinifoliae
1394009	forest tent caterpillar	Malacosoma disstria	defoliation
1365002	Douglas-fir dwarf mistletoe	Arceuthobium douglasii	Witches' brooms on severely infested tree.
1276004	hemlock woolly adelgid	Adelges tsugae	Recently infested
1748044	balsam woolly adelgid	Adelges piceae
1748041	balsam woolly adelgid	Adelges piceae
1748042	balsam woolly adelgid	Adelges piceae
1748040	balsam woolly adelgid	Adelges piceae
1748039	balsam woolly adelgid	Adelges piceae
1210099	common mullein	Verbascum thapsus	Aggressive invasion after prescribed fire; South Platte RD, Pike NF
1241634	pine needle scale	Chionaspis pinifoliae	White pine needle scales and black mold growth which often develops on the exudates of the scale insects.
1241522	aphids
1442210	American dwarf mistletoe	Arceuthobium americanum
1442102	eastern dwarf mistletoe	Arceuthobium pusillum	Maine, October 1974
1442183	clearcut		Bessey Ranger District, Halsey, Nebraska
1442184	clearcut		Bessey Ranger District, Halsey, Nebraska 5-28-87
1442076	dwarf mistletoes	Arceuthobium spp.	Infected pine overstory; Gunnison National Forest, Colorado
1442077	Douglas-fir dwarf mistletoe	Arceuthobium douglasii
0795074	balsam woolly adelgid	Adelges piceae	on Richland balsam at Mt. Mitchell
0745014	annosum root disease	Heterobasidion annosum	infection center
0590099	balsam woolly adelgid	Adelges piceae	stand mortality at Mt. Mitchell
0364001	balsam woolly adelgid	Adelges piceae	stand mortality at Mt. Mitchell
0016200	cogongrass	Imperata cylindrica	under seedling longleaf pine
0016380	cogongrass	Imperata cylindrica	20-year old infestation in pine stand.
0016381	cogongrass	Imperata cylindrica	Herbicide test plots bare in 20-year old stand
0016201	cogongrass	Imperata cylindrica
0016209	Virginia-creeper	Parthenocissus quinquefolia	fall foliage of vine in pine crown
0016210	Virginia-creeper	Parthenocissus quinquefolia	fall foliage
0016211	Virginia-creeper	Parthenocissus quinquefolia	fall foliage in a pine canopy
0016383	trumpetcreeper	Campsis radicans	In planted stand
3227006	annosum root disease	Heterobasidion annosum	aerial view of infection center at Nacogdoches city plant
4060048	forest tent caterpillar	Malacosoma disstria	defoliation in Minnesota
4061085	forest tent caterpillar	Malacosoma disstria	defoliation at Chappewa National Forest, Minnesota, May 1952
3046050	forest tent caterpillar	Malacosoma disstria	aerial view of defoliation in Alabama bottomland
3066031	forest tent caterpillar	Malacosoma disstria	extensive defoliation - Mobile, Alabama
4166017	cypress aphid	Cinara cupressivora	small patch of forest attacked in Kenya, Africa
1307011	cypress aphid	Cinara cupressivora	in east Africa
1307013	leucaena psyllid	Heteropsylla cubana	near Mombasa, Kenya, Africa
1307017	cypress aphid	Cinara cupressivora	in east Africa
1307097	cypress aphid	Cinara cupressivora	small woodland attacked in Kenya, Africa
4178047	Tarsonemid mite	Tarsonemus ips	under thorax
3067042	boxelder bug	Boisea trivittata	aggregating in fall
3056025	oak pit scale	Asterolecanium minus
3056023	oak pit scale	Asterolecanium minus
3047006	forest tent caterpillar	Malacosoma disstria	defoliation by tree
3046009	lecanium scales	Coccus spp.
3046010	lecanium scales	Coccus spp.
2253021	kermes scales	Kermes spp.
1929092	gypsy moth	Lymantria dispar	Neighboorhood with defoliated trees in summer
1929090	gypsy moth	Lymantria dispar	Summer defoliation of trees in urban area
2254052	balsam woolly adelgid	Adelges piceae	on subalpine fir
2253050	forest tent caterpillar	Malacosoma disstria	defoliation of small trees in foreground
2250031	laminated root disease	Phellinus weirii	mortality centers
0949066	pine needle scale	Chionaspis pinifoliae
0949029	pine needle scale	Chionaspis pinifoliae	on lodgepole pine
0949038	spruce spider mite	Oligonychus ununguis
0949039	spruce spider mite	Oligonychus ununguis	note webbing
0949046	black pineleaf scale	Dynaspidiotus californica
0949048	black pineleaf scale	Dynaspidiotus californica	on Jeffery pine
0949051	black pineleaf scale	Dynaspidiotus californica	on Jeffery pine note needle discoloration from feeding
2250045	Schweinitzii root and butt disease	Phaeolus schweinitzii	mortality center
1748009	pine and spruce adelgids	Pineus spp.
1748015	aphids		on locust
1748045	hemlock woolly adelgid	Adelges tsugae
1748060	pine tortoise scale	Toumeyella parvicornis	see also 1748058
1748048	hemlock woolly adelgid	Adelges tsugae	thinning of crown
0590052	dogwood anthracnose	Discula destructiva	defoliated trees
0590071	tuliptree aphid	Illinoia liriodendri	nymphs and adults
0488085	pine bark adelgid	Pineus strobi
0488086	pine bark adelgid	Pineus strobi	to white pine
0488088	oak eriococcin	Eriococcus quercus
0488055	hemlock woolly adelgid	Adelges tsugae