Contents: By Damage and Image
In progress
Contents: Alphabetical

alder flea beetle
aphid management
apple and thorn skeletonizer
apple ermine moth
ash whitefly
azalea bark scale
azalea lace bug
azalea sawfly
Bagrada bug
bark lice
Barypeithes root weevil
Beneficial nematodes
biocontrol of root weevils
birch aphid
black bean aphid
black cherry aphids
black stem borer
bluegum psyllid
Boisduval scale
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid
bulb flies
cabbage whitefly
carnation tortrix
carpet beetle (images)
Calligraph californica

Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
cinnabar moth
clay colored weevil
cottony camellia scale

crane flies
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
elm leafminer
European pine sawfly new
European pine shoot moth
European wool carder bee
emerald ash borer
Fall webworm
fir coneworm new
flatheaded cedar borer
ground beetle gallery
Hemerocallis gall midge new
hollyhock weevil
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
Japanese beetle
lady beetle gallery
leaf weevil
light brown apple moth
Linden aphid new
lupine aphid new
Macrosiphum rhamni new
maple aphids
maple tip moth
maple midge
March flies
mountain ash sawfly
Myzocallis sp. on red oak new
Narcissus bulb fly
natural enemies gallery
oak ambrosia beetle
oak slug
oak twig gall wasp
obscure root weevil
Pacific flatheaded borer
peach tree borer
peach twig borer
pear blight beetle
pear psylla
pear leaf-curling midge
pear sawfly
pine needle scale
pine and cone spittlebug
poplar and willow borer
Psyllopsis fraxinicola
rose curculio weevil
rose midge
rove beetle gallery
rose stem girdler new
sequoia pitch moth
soldier beetle gallery
snakefly gallery
speckled green fruitworm
meadow spittlebug
spotted asparagus beetle
spruce twig aphid
tent caterpillars
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
woolly alder aphid new
woolly ash aphid
woolly beech aphid

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Caterpillar species of concern to PNW nurseries


*Species with an asterisk are considered a threat but not yet established in the PNW.

Leafrollers and leaftiers
fruittree leafroller, Archips argyrospila
European leafroller, Archips rosanus
orange tortrix, Argyrotaenia franciscana
carnation tortrix, Cacaecimorpha pronubana
obliquebanded leafroller, Choristoneura rosaceana
cherry bark tortrix, Enarmonia formosana
African carnation tortrix, Epichoristodes acerbella Walker
holly bud moth [blackheaded fireworm], Rhopobota naevana
omnivorous leafroller, Platynota stultana
apple pandemis, Pandemis pyrusana
threelined leafroller, P. limitata
dark fruit tree tortrix, P. heparana
omnivorous leaftier, Cnephasia longana
*strawbery tortrix, Acleris comariana
*light brown apple moth, Epiphyas postvittana

Webworms and budworms
cotoneaster webworm, Cremona cotoneastri
western spruce budworm, Choristoneura occidentalis
spruce budworm, C. fumiferana
ponderosa pine budworm, C. lambertiana
jack pine budworm, C. pinus ssp.
juniper webworm, Dichomeris marginella
cypress leaftier, Epinotia subviridis


apple and thorn skeletonizer, Choreutis pariana
oak skeletonizer, Bucculatrix ainsliella

Tent Caterpillars/ Large web makers
western tent caterpillar, Malacosoma californicum
Pacific tent caterpillar, M constrictum
forest tent caterpillar, M dispar
fall webworm, Hyphantria cunea
apple ermine moth, Yponomeuta malinellus
cherry ermine moth, Yponomeuta padella

Broadleaf defoliators and leaf feeders
imported cabbageworm, Artogeia rapae[=Pieris rapae]
tobacco or geranium budworm, Heliothis virescens
corn earworm/tomato fruitworm/cotton bollworm, Helicoverpa zea
western oak looper, Lambdina fiscellaria somniaria
satin moth, Leucoma salicis
green fruitworm, Lithophane antennata
spiny elm caterpillar (mourning cloak butterfly), Nymphalis antiopa
*gypsy moth, Lymantria dispar
cabbage looper, Trichoplusia ni
alfalfa looper, Autographa californica
silverspotted tiger moth, Lophocampa argentata
*vine moth, Eupoecilia ambiguella
*green oak Tortrix, Tortrix viridana
winter moth, Operophtera brumata
*the lappet, Gastropacha quercifolia
*silver y moth, Autographa gamma

Conifer defoliator and needle feeders
*Asian gypsy moth, Lymantria dispar (Asian strain)
rusty tussock moth, O. antigua
whitemarked tussock moth, Orygia leucostigma
western tussock moth, O. vetusta
douglas-fir tussock moth, O. pseudotsugata
*nun moth, Lymantria monacha
*pine tree lappet, Dendrolimus pini

spotted cutworm, Xestia c-nigrum
black cutworm, Agrotis ipsilon
variegated cutworm, Peridroma saucia
yellowheaded cutworm, Apamea amputatrix
glassy cutworm, Apamea devastator
large yellow underwing, Noctua pronuba
true armyworm, Pseudaletia unipuncta
western yellowstriped armyworm, Spodoptera praefica (Grote)

snailcase bagworm, Apterona helix

western tentiform leafminer, Phyllonorycter elmaella
lilac leafminer, Caloptilia syringella
azalea leafminer, C. azaleella
*aspen leafblotch miner, Phyllonorycter tremuloidiella
spruce needleminer, Endothenia albolineana
cypress tipminer, Argyresthia cupressella
European spruce needleminer, Epinotia nanana
larch casebearer, Coleophora laricella

fir coneworm, Dioryctria abietivorella

Tip feeders
European pine shoot moth, Rhyacionia buoliana

Tip borers
peach twig borer, Anarsia lineatella
maple twig borer, Proteoteras aesculana
ceanothus stem gall moth, Periploca ceanothiella

Clearwing borers
peachtree borer, Synanthedon exitiosa
western poplar clearwing, Parathrene robiniae
Douglas-fir pitch moth, S. novaroensis
sequoia pitch moth, S. sequoiae
*dusky clearwing, Paranthrene tabaniformis,

Fruit pests
*summer fruit tortrix moth, Adoxophyes orana
*plum fruit maggot, Cydia funebrana
*peach fruit moth, Carposina niponensis
speckled green fruitworm, Orthosia hibisci

Acknowledgements: The authors would like to thank Eric LaGasa, WSDA, Todd Murray, WSU Extension, and Richard Worth, ODA for their comments and review of this list.

Original version: <23 October 2007)

Last revision <4 August 2016>

Authors: Compiled by Robin Rosetta, Department of Horticulture/OSU/NWREC and James Young, [formerly] Department of Botany and Plant Pathology, OSU/Corvallis

Website editor:
Robin Rosetta

Page last modified 8/4/16


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