| 1593081 |
twolined chestnut borer |
Agrilus bilineatus |
Recently thinned oak stand. thinning corresponded with an intense summer drought and forest tent caterpillar defoliation resulting in extensive tree mortality. |
| 1593087 |
eastern larch beetle |
Dendroctonus simplex |
Tamarack infested with eastern larch beetle, bark removal in late winter due to woodpecker probing. |
| 5492750 |
white pine weevil |
Pissodes strobi |
|
| 5492751 |
white pine weevil |
Pissodes strobi |
|
| 5486528 |
May-June beetles |
Phyllophaga spp. |
white grub feeding damage, removal of fine roots on a red pine seedling. |
| 5486516 |
May-June beetles |
Phyllophaga spp. |
Red pine root damage |
| 5486518 |
May-June beetles |
Phyllophaga spp. |
Dead seedlings growing in dense grass, killed by white grub feeding on root system |
| 5486524 |
May-June beetles |
Phyllophaga spp. |
white grub feeding damage, removal of fine roots on a pine seedling. |
| 5486525 |
May-June beetles |
Phyllophaga spp. |
white grub feeding damage, removal of fine roots on a pine seedling. |
| 5486526 |
May-June beetles |
Phyllophaga spp. |
white grub feeding damage, removal of fine roots on a pine seedling. |
| 5486517 |
May-June beetles |
Phyllophaga spp. |
red pine seedling root damage |
| 5486519 |
May-June beetles |
Phyllophaga spp. |
White grubs, different age and size classes. |
| 5486520 |
May-June beetles |
Phyllophaga spp. |
Single larva |
| 5486521 |
May-June beetles |
Phyllophaga spp. |
Single larva |
| 5486522 |
May-June beetles |
Phyllophaga spp. |
Seedlings with damaged root systems |
| 5486523 |
May-June beetles |
Phyllophaga spp. |
root feeding on pine seedling |
| 5486527 |
May-June beetles |
Phyllophaga spp. |
white grub feeding damage, removal of fine roots on a red pine seedling. |
| 5468304 |
mourning cloak butterfly |
Nymphalis antiopa |
|
| 1484011 |
oak bullet gall |
Disholcaspis quercusglobulus |
galls |
| 1398069 |
acorn-plum gall |
Amphibolips quercusjuglans |
galls |
| 1398272 |
forest tent caterpillar |
Malacosoma disstria |
Molted skins of early instar forest tent caterpillars |
| 1457017 |
oak bullet gall |
Disholcaspis quercusglobulus |
Bullet galls formed on the twigs of a young white oak. Also found on neighboring burr oak. Galls secrete a honeydew substance that attracts insects such as wasps, bees and flies. |
| 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 |
| 1593082 |
post oak grasshopper |
Dendrotettix quercus |
Photo taken on an aspen leaf but, feeding damage was mostly observed on neighboring black and northern pin oak |
| 1593085 |
eastern larch beetle |
Dendroctonus simplex |
Gallery pattern of the eastern larch beetle under the bark of an infested tamarack. |
| 1593090 |
robber flies |
|
Robber fly adult with captured prey item (smaller fly). Robber fly had landed on a Forest Service map. |
| 1593091 |
robber flies |
|
Natural enemy, predatory fly, adult robber fly with prey item, another fly species. Robber fly had landed on a Forest Service map. |
| 1593092 |
net-winged beetles |
Calopteron spp. |
Adult beetle |
| 1398264 |
forest tent caterpillar |
Malacosoma disstria |
Pupal cases attached to a cabin in northern MN |
| 1593031 |
black pineleaf scale |
Dynaspidiotus californica |
Scale infestation on needles |
| 1593040 |
black pineleaf scale |
Dynaspidiotus californica |
Scale infestation on needles |
| 1593089 |
pine tip root weevil |
Hylobius rhizophagus |
Branch flagging on a root tip weevil infested tree. |
| 1593032 |
carpenter ants |
Camponotus spp. |
Honeycomb type damage characteristic of carpenter ants. |
| 1593004 |
cooley spruce gall adelgid |
Adelges cooleyi |
Wool-covered adelgids on their alternate host, Douglas-fir. |
| 1593016 |
redheaded pine sawfly |
Neodiprion lecontei |
Feeding damage on a red pine sapling |
| 1593036 |
metalic wood-boring beetless |
Chalcophora spp. |
Larvae found in a dead red pine log |
| 1593037 |
metalic wood-boring beetless |
Chalcophora spp. |
Larvae found in a dead red pine |
| 1593053 |
white pine weevil |
Pissodes strobi |
Classic early attack symptoms in the terminal of an infested eastern white pine. |
| 1593055 |
eastern spruce gall adelgid |
Adelges abietis |
Older galls |
| 1593083 |
native elm bark beetle |
Hylurgopinus rufipes |
|
| 1593079 |
pine engraver |
Ips pini |
boring dust |
| 1593066 |
European pine sawfly |
Neodiprion sertifer |
Early spring defoliation of older needles on an ornamental Mugo pine. |
| 1593006 |
spruce bud scale |
Physokermes piceae |
|
| 1593067 |
Saratoga spittlebug |
Aphrophora saratogensis |
Heavily damaged red pine growing in a dense stand of Sweetfern, the nymphal host of the Saratoga spittlebug |
| 1593075 |
redheaded pine sawfly |
Neodiprion lecontei |
|
| 1593076 |
redheaded pine sawfly |
Neodiprion lecontei |
Group of sawfly larvae |
| 1593077 |
redheaded pine sawfly |
Neodiprion lecontei |
|
| 1593078 |
redheaded pine sawfly |
Neodiprion lecontei |
|
| 1593005 |
eastern spruce gall adelgid |
Adelges abietis |
Odler galls caused by eastern spruce gall adelgid |
| 1593010 |
jack pine budworm |
Choristoneura pinus pinus |
Jack Pine budworm on understory white pine, Chippewa County, Michigan. |
| 1593012 |
white pine weevil |
Pissodes strobi |
Terminal and laterals beging to wilt (die) due to an active infestation of white pine weevil. |
| 1593015 |
Ips engraver beetles |
Ips spp. |
Pockets of Ips beetle attacks in a small 30-year-old red pine plantation, Eau Claire Co., WI. Photo taken during an intense summer drought in July 1998. |
| 1593030 |
eastern tent caterpillar |
Malacosoma americanum |
Tent formed by eastern tent caterpillar. |
| 1593035 |
pine engraver |
Ips pini |
Pine engraver mortality showing up as a pocket of recently killed red pine trees. |
| 1593045 |
red turpentine beetle |
Dendroctonus valens |
Turpentine beetle attack on a fire damaged stem of red pine. |
| 1593049 |
pine bark adelgid |
Pineus strobi |
Main stem coated with cottony-like pine bark adelgids. |
| 1593048 |
pine engraver |
Ips pini |
Nuptial chamber, egg eniches and egg gallery. |
| 1479011 |
Noctuid moth |
Acronicta lanceolaria |
Caterpillar photo |
| 1479010 |
Noctuid moth |
Acronicta lanceolaria |
caterpillar |
| 5424266 |
Giant ichneumon wasp |
Megarhyssa spp. |
Adult Megarhyssa with ovipositor extended |
| 5424267 |
Giant ichneumon wasp |
Megarhyssa spp. |
Female with ovipositor inserted through the bark of an American elm |
| 5468289 |
red admiral |
Vanessa atalanta |
Adult nectaring on a purple coneflower |
| 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 |
| 1398059 |
post oak grasshopper |
Dendrotettix quercus |
Jackson County, Wisconsin |
| 5468216 |
ash borer |
Podosesia syringae |
|
| 5468294 |
boxelder bug |
Boisea trivittata |
Adults and nymphs |
| 5468295 |
boxelder bug |
Boisea trivittata |
Adults and nymphs |
| 5468296 |
boxelder bug |
Boisea trivittata |
Adults and nymphs |
| 5468297 |
boxelder bug |
Boisea trivittata |
Adults and nymphs |
| 5468217 |
ash borer |
Podosesia syringae |
|
| 5468307 |
pine gall weevil |
Podapion gallicola |
|
| 5468306 |
pine gall weevil |
Podapion gallicola |
|
| 5468218 |
ash borer |
Podosesia syringae |
|
| 5468292 |
pine false webworm |
Acantholyda erythrocephala |
|
| 5468293 |
pine false webworm |
Acantholyda erythrocephala |
|
| 5468288 |
baldfaced hornet |
Dolichovespula maculata |
nest |
| 5468302 |
western conifer-seed bug |
Leptoglossus occidentalis |
|
| 5468303 |
western conifer-seed bug |
Leptoglossus occidentalis |
|
| 5468305 |
mourning cloak butterfly |
Nymphalis antiopa |
|
| 5370013 |
metalic wood-boring beetles |
Dicerca spp. |
Mating pair of adults on the bark of a red pine |
| 5443518 |
red turpentine beetle |
Dendroctonus valens |
Pitch tube at tree base |
| 5443566 |
Japanese beetle |
Popillia japonica |
|
| 5443567 |
Japanese beetle |
Popillia japonica |
|
| 5443550 |
larch sawfly |
Pristiphora erichsonii |
Characteristic curved twig caused by damage from egg laying |
| 5443551 |
larch sawfly |
Pristiphora erichsonii |
Characteristic curved twig caused by damage from egg laying
|
| 5443552 |
aspen blotchminer |
Phyllonorycter apparella |
Leaf mining |
| 5443553 |
aspen blotchminer |
Phyllonorycter apparella |
Leaf mining |
| 5443554 |
aspen blotchminer |
Phyllonorycter apparella |
|
| 5443555 |
aspen blotchminer |
Phyllonorycter apparella |
Leaf mining |
| 5443528 |
introduced pine sawfly |
Diprion similis |
|
| 5443529 |
introduced pine sawfly |
Diprion similis |
|
| 5443530 |
introduced pine sawfly |
Diprion similis |
|
| 5443531 |
introduced pine sawfly |
Diprion similis |
|
| 5443532 |
introduced pine sawfly |
Diprion similis |
|
| 5443539 |
Japanese beetle |
Popillia japonica |
Skeletonizing on Buckeye, August 2011 |
| 5443540 |
Japanese beetle |
Popillia japonica |
Skeletonizing on European linden, August 2011 |
| 5443541 |
Japanese beetle |
Popillia japonica |
Skeletonizing on European linden, August 2011 |
| 5443542 |
Japanese beetle |
Popillia japonica |
Skeletonizing on European linden . August 2011 |
| 5443543 |
Japanese beetle |
Popillia japonica |
Skeletonizing on European linden. August 2011 |
| 5443544 |
Japanese beetle |
Popillia japonica |
Defoliation on a buckeye. August 2011 |
| 5443545 |
Japanese beetle |
Popillia japonica |
Defoliation on a buckeye. August 2011 |
| 5443546 |
Japanese beetle |
Popillia japonica |
Defoliation on European linden. August 2011 |
| 5443547 |
Japanese beetle |
Popillia japonica |
Defoliation on European linden. August 2011 |
| 5443564 |
Japanese beetle |
Popillia japonica |
|
| 5443565 |
Japanese beetle |
Popillia japonica |
|
| 5424285 |
hemlock borer |
Phaenops fulvoguttata |
Overwintering larva within the bark of an infested hemlock trees |
| 1398140 |
eastern pine seedworm |
Cydia toreuta |
|
| 1398013 |
two-spotted lady beetle |
Adalia bipunctata |
Photo taken in early spring, Minnesota, balsam fir was infested with balsam twig aphid, Mindarus abietinus |
| 1398118 |
red pine cone beetle |
Conophthorus resinosae |
Bisected cone with an adult female in her egg gallery |
| 1398168 |
mountain pine beetle |
Dendroctonus ponderosae |
Pitch tubes. Medicine Bow Mountains, southeast Wyoming |
| 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. |
| 1398244 |
forest tent caterpillar |
Malacosoma disstria |
Pupal case tied into foliage, northern MN. |
| 1457028 |
eastern tent caterpillar |
Malacosoma americanum |
Multiple tents. Photo taken in Jackson Co., WI. |
| 1398120 |
leaffooted pine seed bug |
Leptoglossus corculus |
|
| 1398012 |
multicolored Asian lady beetle |
Harmonia axyridis |
Anoka Co., MN |
| 1388028 |
polyphemus moth |
Antheraea polyphemus |
|
| 1388023 |
pecan leaf casebearer |
Acrobasis juglandis |
Silk tube with embedded frass produced by the larval stage. |
| 1398009 |
pine root collar weevil |
Hylobius radicis |
Scots and red pine showing various stages of damage from the pine root collar weevil. Damage is often heaviest along plantation edges where grass competition is intense. Photo taken in Jackson Co. Wisconsin |
| 2121086 |
conifer sawfly |
Gilpinia frutetorum |
Photo taken on the Sand Dunes State Forest, Sherburne County, MN 2005 |
| 1457024 |
bronze birch borer |
Agrilus anxius |
Callus tissue formed by the larval feeding gallery, visible on the main stem. Photo taken in Moundsview, MN. |
| 1398136 |
cone midge |
Resseliella spp. |
Two cone midge larvae found beneath the savcle of an infested cone. Grant Co. WI. |
| 1199034 |
white pine weevil |
Pissodes strobi |
Emergence hole |
| 1199006 |
large aspen tortrix |
Choristoneura conflictana |
|
| 1398090 |
emerald ash borer |
Agrilus planipennis |
Dead trees in a landscape setting. Ann Arbor, MI, June 2005 |
| 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 |
|
| 1199023 |
spruce bud scale |
Physokermes piceae |
Mature scales on a branch |
| 1398275 |
aspen blotchminer |
Phyllonorycter apparella |
Blotch mines. This leaf miner is common in northern MN, WI and MI. |
| 1398234 |
poplar borer |
Saperda calcarata |
Young aspen stem with a sap bleeding wound caused by larval tunneling activity. Chippewa Co, WI 2005 |
| 1398166 |
hummingbird clearwing |
Hemaris thysbe |
Adult moth at rest, photo taken at Willow River State Park, St. Croix Co., WI |
| 1398159 |
elm sawfly |
Cimbex americana |
Pink coloration is not common, most larvae are green to yellow in color. |
| 1398117 |
pine webworm |
Pococera robustella |
web nest |
| 1398057 |
leafhopper |
Typhlocyba albicans |
Stippling damage on leaf in early summer. Hiawatha National Forest, MI |
| 1398040 |
sugar maple borer |
Glycobius speciosus |
Characteristic larval gallery pattern on an open wound site, main stem. Photo taken in northern Wisconsin |
| 1398029 |
red pine shoot moth |
Dioryctria resinosella |
|
| 1398034 |
cecropia moth |
Hyalophora cecropia |
Photo taken in Anoka County, Minnesota. |
| 1398036 |
forest tent caterpillar |
Malacosoma disstria |
Late instar larval mass on the stem of an aspen tree. Northern Minnesota. |
| 1398091 |
emerald ash borer |
Agrilus planipennis |
|
| 1398093 |
emerald ash borer |
Agrilus planipennis |
Boulevard tree with heavy woodpecker activity. Ann Arbor, MI, 2004. |
| 1398028 |
red pine shoot moth |
Dioryctria resinosella |
Characteristic pitch tube on a red pine shoot. |
| 1398041 |
sugar maple borer |
Glycobius speciosus |
External damage on live standing tree |
| 1398084 |
leafcurl ash aphid |
Meliarhizophagus fraxinifolii |
Distorted foliage due to an aphid infestation on green ash. Photo taken in Minnesota. |
| 1398085 |
ash plant bug |
Tropidosteptes amoenus |
Stippling damage on ash leaflet |
| 1398095 |
oak webworm |
Archips fervidana |
Webbed leaves |
| 1398071 |
walnut shoot moth |
Acrobasis demotella |
|
| 1398038 |
elm sawfly |
Cimbex americana |
Pink coloration |
| 1398016 |
balsam twig aphid |
Mindarus abietinus |
Twisted needles on new growth, early spring. Photo taken in Anoka County, MN |
| 1398224 |
pine bark adelgid |
Pineus strobi |
Whitewashed appearance on a heavily infested stem. Waushara County, Wisconsin |
| 1398031 |
locust leafminer |
Odontota dorsalis |
Leaf mines |
| 1398032 |
bronze birch borer |
Agrilus anxius |
Adult beetle and D-shaped exit holes |
| 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. |
| 1398223 |
pine bark adelgid |
Pineus strobi |
White cottony masses on the bark |
| 1398191 |
spruce needleminer |
Taniva albolineana |
|
| 1398255 |
large aspen tortrix |
Choristoneura conflictana |
Empty pupal case protruding from a silk-teid aspen leaf. |
| 1398116 |
cone midge |
Resseliella spp. |
Larvae feeding inside of a red pine cone scale. Grant Co., WI |
| 1199001 |
pine root collar weevil |
Hylobius radicis |
To base. |
| 1199022 |
spruce needleminer |
Taniva albolineana |
|
| 1388002 |
cecropia moth |
Hyalophora cecropia |
on the stem of a river birch, Betula nigra. Blaine, MN (Anoka County) |
| 1398160 |
eastern tiger swallowtail |
Papilio glaucus |
|
| 1398158 |
monarch butterfly |
Danaus plexippus |
on purple cone flower |
| 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 |
| 1398256 |
large aspen tortrix |
Choristoneura conflictana |
|
| 1398198 |
white-lined sphinx |
Hyles lineata |
Late instar caterpillar |
| 1398152 |
dragonflies and damselflies |
|
mating. Wyoming |
| 1398121 |
webbing coneworm |
Dioryctria disclusa |
Round entrance hole in a developing red pine cone |
| 1398247 |
forest tent caterpillar |
Malacosoma disstria |
Late-instar caterpillar |
| 1398273 |
forest tent caterpillar |
Malacosoma disstria |
Late instar larvae massed on a young aspen tree. northwest Wisconsin, 2001. |
| 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 |
| 1398274 |
aspen leafminer |
Phyllocnistis populiella |
small track mines. Central Minnesota |
| 1398265 |
birch leafminer |
Fenusa pusilla |
Brown blistered leaves on a paper birch, late spring in northern Minnesota |
| 1398254 |
large aspen tortrix |
Choristoneura conflictana |
Upper Peninsula of Michigan |
| 1199032 |
elm sawfly |
Cimbex americana |
Pink coloration is uncommon. Most larvae are yellow or green. |
| 2121084 |
conifer sawfly |
Gilpinia frutetorum |
Photo taken on the Sand Dunes State Forest, Sherburne County, MN. |
| 1457015 |
sugar maple borer |
Glycobius speciosus |
Open-faced canker at an old attack site. Larval gallery is visible etched on the sapwood. |
| 1457031 |
blackheaded ash sawfly |
Tethida barda |
Group of larvae on the under-side of an ash leaflet. |
| 2121085 |
conifer sawfly |
Gilpinia frutetorum |
Photo taken on the Sand Dunes State Forest, Sherburne County, MN 2005 |
| 1398258 |
leafminer flies |
|
|
| 1457041 |
red pine cone beetle |
Conophthorus resinosae |
Adult female in an egg gallery, developing red pine seed can be seen at the bottom of the image. |
| 2121094 |
introduced pine sawfly |
Diprion similis |
Photo taken in Sept, 2005, Ramsey Co., MN |
| 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. |
| 1398055 |
greenstriped mapleworm |
Dryocampa rubicunda |
Single late-instar caterpillar |
| 1457027 |
eastern tent caterpillar |
Malacosoma americanum |
Single tent with caterpillars. Photo taken in Jackson, Co., WI. |
| 2121093 |
introduced pine sawfly |
Diprion similis |
In a defensive posture. Photo taken in Sept. 2005 in Ramsey Co., MN. |
| 1398094 |
emerald ash borer |
Agrilus planipennis |
|
| 1199021 |
spruce needleminer |
Taniva albolineana |
|
| 1457001 |
aspen blotchminer |
Phyllonorycter apparella |
Blotch mines on aspen leaves in northern Minnesota |
| 1398027 |
locust leafminer |
Odontota dorsalis |
Individual leaf mine |
| 1457026 |
monarch butterfly |
Danaus plexippus |
Single caterpillar on a common milkweed leaf. Milkweed flower is visible. |
| 1398047 |
dogwood sawfly |
Macremphytus tarsatus |
Typical resting posture |
| 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 |
| 1398228 |
white pine weevil |
Pissodes strobi |
Evidence of an old weevil attack on a 20-25 yr old white pine in Wisconsin. |
| 1199019 |
white pine cone borer |
Eucosma tocullionana |
|
| 1398063 |
blackheaded ash sawfly |
Tethida barda |
Group of later instar larvae on an ash leaflet |
| 1398026 |
aspen blotchminer |
Phyllonorycter apparella |
Common in the northern parts of MN, WI and MI |
| 1398096 |
oak webworm |
Archips fervidana |
Two larvae in a frass filled nest |
| 1398193 |
spruce gall midge |
Mayetiola piceae |
|
| 1398030 |
red pine shoot moth |
Dioryctria resinosella |
|
| 1457032 |
forest tent caterpillar |
Malacosoma disstria |
Group of late-instar larvae on the main stem of an aspen tree, northern Wisconsin, summer 2003. |
| 1199035 |
white pine weevil |
Pissodes strobi |
|
| 1398043 |
mountain-ash sawfly |
Pristiphora geniculata |
|
| 1388015 |
hemlock borer |
Phaenops fulvoguttata |
Single larva located under the bark of a mature, recently killed eastern hemlock. Brunet Island State Park, Chippewa County, Wisconsin. |
| 1398242 |
forest tent caterpillar |
Malacosoma disstria |
Multiple late instar larvae feeding on an ash leaf. |
| 1388018 |
eastern tiger swallowtail |
Papilio glaucus |
Nectaring on a blazing star. |
| 1388034 |
basswood thrips |
Neohydatothrips tiliae |
|
| 1388027 |
pine spittlebug |
Aphrophora cribrata |
Spittle |
| 1388017 |
syrphid or flower flies |
|
|
| 1388024 |
balsam twig aphid |
Mindarus abietinus |
Twisted (distorted) new foliage |
| 1398081 |
oak apple gall |
Amphibolips spp. |
developing gall. |
| 1398266 |
bronze birch borer |
Agrilus anxius |
Adult and a D-shaped emergence hole. |
| 1398033 |
bronze birch borer |
Agrilus anxius |
|
| 1398075 |
butternut woolyworm |
Eriocampa juglandis |
|
| 1398011 |
balsam gall midge |
Paradiplosis tumifex |
needle galls |
| 1398232 |
pine engraver |
Ips pini |
Pocket of dead older red pine killed by Ips pini, |
| 1398206 |
larch sawfly |
Pristiphora erichsonii |
Small group of larvae |
| 1398128 |
red pine shoot moth |
Dioryctria resinosella |
|
| 1199018 |
red pine cone borer |
Eucosma monitorana |
Oval entrance holes on the face of a developing cone. |
| 1398080 |
ash and privet borer |
Tylonotus bimaculatus |
Single larva and cross-section of a larval gallery in ash. Adults reared to confirm identification. Material collected in Hennepin Co., MN in a dying ash tree. |
| 1398017 |
syrphid or flower flies |
|
Adult syrphid ovipositing on a balsam fir twig infested with balsam woolly adelgid. Anoka Co., MN, late May. |
| 1398101 |
gypsy moth |
Lymantria dispar |
First instar larvae |
| 1398079 |
ash and privet borer |
Tylonotus bimaculatus |
Single larva and the cross-section of a larval gallery. Adults were reared to confirm identification. Larvae collected from a dying ash tree on the Minneapolis (MN) campus of the University of Minnesota (Hennepin Co., MN). |
| 1398150 |
baldfaced hornet |
Dolichovespula maculata |
|
| 1398211 |
red pine cone beetle |
Conophthorus resinosae |
Pitch tube on twig |
| 1199017 |
webbing coneworm |
Dioryctria disclusa |
|
| 5424270 |
oak apple gall |
Amphibolips spp. |
Two galls, one with a exit hole. |
| 5424271 |
oak apple gall |
Amphibolips spp. |
Two galls, one with an exit hole. |
| 5424272 |
oak apple gall |
Amphibolips spp. |
Two galls, one with an exit hole |
| 1398210 |
red pine cone beetle |
Conophthorus resinosae |
|
| 1398018 |
syrphid or flower flies |
|
|
| 1398114 |
white pine cone beetle |
Conophthorus coniperda |
Dead cones hanging on tree |
| 1398271 |
forest tent caterpillar |
Malacosoma disstria |
Various caterpillar instars and molted skins on the stem of a young aspen tree, northern MN |
| 1398127 |
webbing coneworm |
Dioryctria disclusa |
Attack site at the base of a red pine cone. |
| 1199012 |
Zimmerman pine moth |
Dioryctria zimmermani |
Pitch masses are generally concentrated at the branch whorl. |
| 1199007 |
large aspen tortrix |
Choristoneura conflictana |
|
| 1199009 |
bronze birch borer |
Agrilus anxius |
Adult bronze birch borer and D-shaped emergence holes |
| 1199010 |
bronze birch borer |
Agrilus anxius |
|
| 1398115 |
white pine cone beetle |
Conophthorus coniperda |
Infested cones of various size. Oconto River Seed Orchard, Nicolet National Forest, Wisconsin |
| 1199011 |
birch leafminer |
Fenusa pusilla |
Leaf mines |
| 1398100 |
gypsy moth |
Lymantria dispar |
First instar larvae on an egg mass. Photo taken on the Nicolet National Forest, Wisconsin, 2002. |
| 1199036 |
white pine weevil |
Pissodes strobi |
Stem deformity caused by an earlier attack |
| 1457036 |
red pine cone borer |
Eucosma monitorana |
Infested cone, small oval entrance holes with fine frass are visible on the face of this cone. |
| 1398102 |
gypsy moth |
Lymantria dispar |
Female with egg mass |
| 1398103 |
gypsy moth |
Lymantria dispar |
Female with egg mass. |
| 1398251 |
American aspen beetle |
Gonioctena americana |
Small group of larvae feeding on the underside of an aspen leaf. |
| 1199024 |
spruce gall midge |
Mayetiola piceae |
|
| 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 |
| 1398237 |
forest tent caterpillar |
Malacosoma disstria |
Egg mass |
| 1398238 |
bronze poplar borer |
Agrilus liragus |
Winding gallery pattern showing on the outer bark |
| 1398214 |
jack pine budworm |
Choristoneura pinus pinus |
late-instar larvae |
| 1398066 |
woolly elm aphid |
Eriosoma americanum |
Leaf gall |
| 1398157 |
eastern tiger swallowtail |
Papilio glaucus |
Nectaring at a blazing star |
| 1388033 |
leafhopper |
Typhlocyba albicans |
Michigan's Upper Peninsula |
| 1388030 |
chainspotted geometer |
Cingilia catenaria |
|
| 1388025 |
red pine shoot moth |
Dioryctria resinosella |
Pitch tube on a shoot infested with a single larva |
| 1388022 |
oak shothole leafminer |
Agromyza viridula |
Shot hole pattern in leaf. Central lower Michigan |
| 1398154 |
monarch butterfly |
Danaus plexippus |
|
| 1388026 |
fall webworm |
Hyphantria cunea |
Web. Web formed by fall webworm on cherry, central Minnesota, and larvae, August. |
| 1388021 |
twolined chestnut borer |
Agrilus bilineatus |
Early signs of attack. Dead and dying branches in the upper crown. |
| 1199002 |
pine root collar weevil |
Hylobius radicis |
Various stages of damage in a mixed red and Scots pine stand. Damage concentrated along stand edge where grass is competing with the trees. |
| 1398051 |
beech scale |
Cryptococcus fagisuga |
Trunk covered with scale. Michigan's upper peninsula, 2004. |
| 1388003 |
gypsy moth |
Lymantria dispar |
NPV infected larva |
| 1398049 |
beech scale |
Cryptococcus fagisuga |
Beech scale covering the bark of a larger American beech. Upper Peninsula of Michigan, 2002 |
| 2121099 |
red pine shoot moth |
Dioryctria resinosella |
Infested shoot that has died, characteristic damage in late summer. Photo taken in July 2005 |
| 1388031 |
basswood leafroller |
Pantographa limata |
rolled leaf |
| 1398267 |
bronze birch borer |
Agrilus anxius |
D-shaped exit holes |
| 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 |
| 1484021 |
stink bugs |
|
stink bug nymph feeding on sawfly larvae |
| 1388035 |
introduced basswood thrips |
Thrips calcaratus |
Characteristic early spring damage on trees attacked. Damaged buds may abort or produce distorted, shredded leaves. Introduced basswood thrips is a common basswood defoliator in northern Wisconsin, northern Michigan and Minnesota. Tree mortality is rare but growth loss does occur. |
| 1457003 |
forest tent caterpillar |
Malacosoma disstria |
NPV Virus killed |
| 1398259 |
birch leafminer |
Fenusa pusilla |
Early leaf mines |
| 5370012 |
gypsy moth |
Lymantria dispar |
Caterpillar |
| 5424286 |
hemlock borer |
Phaenops fulvoguttata |
Single larva of the hemlock borer.March 2010 |
| 5424287 |
hemlock borer |
Phaenops fulvoguttata |
Close-up of a larva, late winter, under the bark of eastern hemlock.March, 2010 |
| 5424288 |
hemlock borer |
Phaenops fulvoguttata |
Infested hemlock. Woodpecker probing has stripped the outer bark off of this infested tree. The red under-bark is very visible against snow in late winter. March 2010 |
| 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 |
| 5424241 |
emerald ash borer |
Agrilus planipennis |
Early-stage emerald ash borer gallery |
| 5424251 |
larch sawfly |
Pristiphora erichsonii |
Group of larvae |
| 5424252 |
larch sawfly |
Pristiphora erichsonii |
single larva |
| 5424253 |
larch sawfly |
Pristiphora erichsonii |
single larva |
| 5424254 |
larch sawfly |
Pristiphora erichsonii |
single larva |
| 5424243 |
elm leafminer |
Kaliofenusa ulmi |
Leafminer larvae inside leaf mines |
| 5424244 |
elm leafminer |
Kaliofenusa ulmi |
Blister like leaf mine, larvae can be seen inside the mines. |
| 5424247 |
spiny looper |
Phigalia titea |
Larva |
| 5424248 |
spiny looper |
Phigalia titea |
caterpillar |
| 5424249 |
fletcher scale |
Parthenolecanium fletcheri |
Scale bodies on white-cedar foliage, mid-summer |
| 5424250 |
fletcher scale |
Parthenolecanium fletcheri |
Scale bodies on foliage of northern white-cedar |
| 5424261 |
European pine sawfly |
Neodiprion sertifer |
Feeding damage to red pine by European pine sawfly, older needles are consumed, new-foliage is not eaten. |
| 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. |
| 5424257 |
European pine sawfly |
Neodiprion sertifer |
Cluster of larvae |
| 5424258 |
European pine sawfly |
Neodiprion sertifer |
cluster of larvae |
| 5424259 |
European pine sawfly |
Neodiprion sertifer |
Early season defoliation by European pine sawfly on a red pine. Larvae eat only previous-years needles. |
| 5424260 |
European pine sawfly |
Neodiprion sertifer |
cluster of larvae |
| 5370016 |
sawflies |
Caliroa spp. |
larvae feeding on the lower surface of a bur oak leaf |
| 5369985 |
forest tent caterpillar |
Malacosoma disstria |
Cluster of larvae on the stem of a crab apple tree, 2007 |
| 5203001 |
woolly apple aphid |
Eriosoma lanigerum |
Distorted leaf; photo taken in early June. |
| 5369986 |
European pine sawfly |
Neodiprion sertifer |
Colony of larvae |
| 5369987 |
European pine sawfly |
Neodiprion sertifer |
clump of feeding larvae |
| 5369988 |
balsam twig aphid |
Mindarus abietinus |
Damage, twisted foliage in early spring |
| 5369989 |
balsam twig aphid |
Mindarus abietinus |
Damage, twisted needles in early spring |
| 5369990 |
balsam twig aphid |
Mindarus abietinus |
Damage, twisted needles in early spring |
| 5370021 |
sawflies |
Caliroa spp. |
feeding injury as it appears on the uppper surface of the leaf |
| 5370023 |
black swallowtail |
Papilio polyxenes |
|
| 5370008 |
gypsy moth |
Lymantria dispar |
Caterpillar, late instar |
| 5370009 |
gypsy moth |
Lymantria dispar |
Caterpillar, late instar |
| 5370010 |
gypsy moth |
Lymantria dispar |
caterpillar, late instar |
| 1398169 |
long-horned beetles |
|
Evidence of tunneling by Cerambycid larva under the bark of a recently killed white spruce |
| 1398222 |
white pine weevil |
Pissodes strobi |
|
| 1398054 |
elm sawfly |
Cimbex americana |
|
| 2121087 |
conifer sawfly |
Gilpinia frutetorum |
|
| 2121091 |
snout beetles or weevils |
|
Acorn weevil larva that emerged from an infested northern pin oak acorn. The exit hole is visible as is internal damage to the acorn. The genus is either Curculio or Conotrachelus. Collected in Ramsey Co., MN, Sept. 2005 |
| 1398260 |
birch leafminer |
Fenusa pusilla |
|
| 1398262 |
birch leafminer |
Fenusa pusilla |
A heavily infested landscape tree |
| 1484010 |
pine webworm |
Pococera robustella |
|
| 1484007 |
fall webworm |
Hyphantria cunea |
webbing with defoliation; webbed foliage |
| 5203002 |
mourning cloak butterfly |
Nymphalis antiopa |
Photo taken in Ramsey Co., MN, June 2006 |
| 5203003 |
woolly elm aphid |
Eriosoma americanum |
American elm leaf distorted by woolly elm aphid; Photo taken in Ramsey Co., MN, June 2006 |
| 5203004 |
woolly elm aphid |
Eriosoma americanum |
American elm leaf distorted by woolly elm aphid; photo taken in ramsey Co., MN, June 2006 |
| 5203005 |
woolly elm aphid |
Eriosoma americanum |
Elm leaf distorted by woolly elm aphids; Photo taken in Ramsey Co., MN, June 2006 |
| 5203006 |
mourning cloak butterfly |
Nymphalis antiopa |
photo taken in Ramsey Co., MN |
| 5203007 |
mourning cloak butterfly |
Nymphalis antiopa |
Photo taken in Ramsey Co, MN, June 2006 |
| 5203008 |
weevil |
Polydrusus spp. |
photo taken in Ramsey Co., MN |
| 5203009 |
weevil |
Polydrusus spp. |
Photo taken in Ramsey Co., MN. |
| 5203010 |
weevil |
Polydrusus spp. |
Photo taken in Ramsey Co., MN |
| 5203011 |
goldsmith beetle |
Cotalpa lanigera |
|
| 5203012 |
goldsmith beetle |
Cotalpa lanigera |
Specimen from northeast Iowa |
| 5203013 |
linden looper |
Erannis tiliaria |
|
| 5203014 |
linden looper |
Erannis tiliaria |
|
| 5203015 |
linden looper |
Erannis tiliaria |
|
| 5203019 |
elder borer |
Desmocerus palliatus |
Adult photographed in Pine Co., MN |
| 5203020 |
meadowhawks |
Sympetrum spp. |
Photo taken at the University of Minnesota Landscape Arboretum |
| 5203022 |
hackberry nipplegall maker |
Pachypsylla celtidismamma |
Galls caused by the hackberry nipple gall maker on the underside of a hackberry leaf; Photo taken in Ramsey Co., MN |
| 5203023 |
hackberry nipplegall maker |
Pachypsylla celtidismamma |
galls caused by the hackberry nipple gall maker on the underside of a hackberry leaf; Photo taken in Ramsey Co., MN |
| 5203024 |
hackberry nipplegall maker |
Pachypsylla celtidismamma |
Single gall |
| 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. |
| 5202059 |
red pine shoot moth |
Dioryctria resinosella |
Pitch tube |
| 5202060 |
red pine shoot moth |
Dioryctria resinosella |
Dead shoots in mid-August; Photo taken in central Wisconsin, Jackson Co., WI |
| 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 |
| 5202064 |
introduced pine sawfly |
Diprion similis |
|
| 5202065 |
introduced pine sawfly |
Diprion similis |
|
| 5202066 |
introduced pine sawfly |
Diprion similis |
|
| 5202067 |
introduced pine sawfly |
Diprion similis |
|
| 5202088 |
European pine sawfly |
Neodiprion sertifer |
Photo taken in late May, Ramsey Co., MN |
| 5202089 |
European pine sawfly |
Neodiprion sertifer |
photo taken in late May, Ramsey Co., WI |
| 5202090 |
European pine sawfly |
Neodiprion sertifer |
Photo taken in May, Ramsey Co., MN |
| 5202091 |
European pine sawfly |
Neodiprion sertifer |
Group of feeding larvae; Photo taken in Ramsey Co., MN |
| 5202094 |
linden looper |
Erannis tiliaria |
|
| 5202095 |
linden looper |
Erannis tiliaria |
|
| 5202096 |
linden looper |
Erannis tiliaria |
|
| 1484008 |
fall webworm |
Hyphantria cunea |
larvae enclosed in webbing on cherry |
| 1484009 |
fall webworm |
Hyphantria cunea |
larvae enclosed in webbing on cherry |
| 1484012 |
polyphemus moth |
Antheraea polyphemus |
|
| 1484014 |
io moth |
Automeris io io |
|
| 1484015 |
io moth |
Automeris io io |
|
| 1484016 |
eastern tiger swallowtail |
Papilio glaucus |
|
| 1484001 |
eastern tiger swallowtail |
Papilio glaucus |
|
| 1484002 |
eastern tiger swallowtail |
Papilio glaucus |
|
| 1484003 |
emerald ash borer |
Agrilus planipennis |
Photo taken in August 2002 in Livonia, MI. |
| 1484004 |
emerald ash borer |
Agrilus planipennis |
infested tree showing water sprouts or adventitious shoots |
| 1484013 |
blackheaded ash sawfly |
Tethida barda |
|
| 1398022 |
multicolored Asian lady beetle |
Harmonia axyridis |
|
| 1199013 |
eastern pine seedworm |
Cydia toreuta |
Cydia torenta |
| 1479016 |
northeastern sawyer |
Monochamus notatus |
|
| 1479018 |
yellowheaded spruce sawfly |
Pikonema alaskensis |
Characteristic feeding damage on a young open-grown white spruce. Photo taken near Park Rapids, Minnesota. |
| 1479024 |
Saratoga spittlebug |
Aphrophora saratogensis |
Branch mortality caused by adult Saratoga spittlebug feeding damage on young red pine. Similar damage can be caused by Sirococcus shoot blight. Photo taken on the Ottawa National Forest, Michigan. |
| 1479005 |
Allegheny mound ant |
Formica exsectoides |
mound in field |
| 1479006 |
Allegheny mound ant |
Formica exsectoides |
mound in field |
| 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. |
| 1479001 |
gypsy moth |
Lymantria dispar |
females laying eggs |
| 2121092 |
acorn and nut weevils |
Curculio spp. |
Acorn weevil larva that emerged from an infested northern pin oak acorn. The exit hole is visible as is internal damage to the acorn. The genus is either Curculio or Conotrachelus. Collected in Ramsey Co., MN, Sept. 2005 |
| 1479002 |
gypsy moth |
Lymantria dispar |
larvae emerging from egg mass |
| 1479013 |
orangestriped oakworm |
Anisota senatoria |
|
