Resource Database


Resource Number: 14501
Title: Field Guide for the Biological Control of Weeds in the Northwest
Resource Type: Field guide
Last Updated: February 27, 2026
Domain(s)/Area(S):
Subject
Hungarian clearwing moth  (Chamaesphecia hungarica)
Canada thistle stem-gall fly  (Urophora cardui)
Canada thistle  (Cirsium arvense)
musk thistle, nodding thistle  (Carduus nutans)
spotted knapweed  (Centaurea stoebe ssp. micranthos)
purple loosestrife  (Lythrum salicaria)
tamarisk  (Tamarix spp.)
black dot spurge flea beetle  (Aphthona nigriscutis)
copper leafy spurge flea beetle  (Aphthona flava)
brown-legged spurge flea beetle  (Aphthona lacertosa)
leafy spurge gall midge  (Spurgia esulae)
knapweed gall fly  (Urophora affinis)
knapweed seed head fly  (Urophora quadrifasciata)
knapweed seedhead moth  (Metzneria paucipunctella)
sulfur knapweed moth  (Agapeta zoegana)
knapweed root weevil  (Cyphocleonus achates)
lesser knapweed flower weevil  (Larinus minutus)
knapweed peacock fly  (Chaetorellia acrolophi)
green knapweed clearwing fly  (Terellia virens)
bull thistle  (Cirsium vulgare)
bull thistle gall fly  (Urophora stylata)
musk thistle head weevil  (Rhinocyllus conicus)
puccinia rust  (Puccinia carduorum)
spiny plumeless thistle, plumeless thistle  (Carduus acanthoides)
thistle crown weevil  (Trichosirocalus horridus)
nodding thistle gall fly  (Urophora solstitialis)
spurge hawkmoth  (Hyles euphorbiae)
minute spurge flea beetle  (Aphthona abdominalis)
brown dot leafy spurge flea beetle  (Aphthona cyparissiae)
black leafy spurge flea beetle  (Aphthona czwalinai)
yellow toadflax  (Linaria vulgaris)
puncturevine  (Tribulus terrestris)
black-margined loosestrife beetle  (Galerucella calmariensis)
purple loosestrife root mining weevil  (Hylobius transversovittatus)
flower feeding weevil  (Nanophyes marmoratus)
clearwing moth  (Chamaesphecia crassicornis)
field bindweed  (Convolvulus arvensis)
bindweed gall mite  (Aceria malherbae)
gorse, common gorse  (Ulex europaeus)
gorse tip moth  (Agonopterix nervosa)
gorse seed weevil  (Exapion ulicis)
gorse spider mite  (Tetranychus lintearius)
meadow knapweed  (Centaurea x moncktonii)
bronze knapweed root borer  (Sphenoptera jugoslavica)
brown-winged root moth  (Pelochrista medullana)
brown-winged knapweed moth  (Pterolonche inspersa)
blunt knapweed flower weevil  (Larinus obtusus)
puncturevine seed weevil  (Microlarinus lareynii)
poison hemlock  (Conium maculatum)
defoliating hemlock moth  (Agonopterix alstroemeriana)
squarrose knapweed  (Centaurea virgata)
broad-nosed knapweed seed head weevil  (Bangasternus fausti)
yellow star thistle gall fly  (Urophora sirunaseva)
Russian knapweed  (Rhaponticum repens)
yellow starthistle  (Centaurea solstitialis)
yellow starthistle bud weevil  (Bangasternus orientalis)
yellow starthistle peacock fly  (Chaetorellia australis)
yellow starthistle hairy weevil  (Eustenopus villosus)
yellow starthistle flower weevil  (Larinus curtus)
puncturevine stem weevil  (Microlarinus lypriformis)
golden loosestrife beetle  (Galerucella pusilla)
rush skeletonweed  (Chondrilla juncea)
skeletonweed gall midge  (Cystiphora schmidti)
rush skeletonweed rust  (Puccinia chondrillina)
Scotch broom  (Cytisus scoparius)
Scottish broom seed weevil  (Exapion fuscirostre)
twig-mining moth  (Leucoptera spartifoliella)
common St. Johnswort  (Hypericum perforatum)
St. John's wort beetle  (Agrilus hyperici)
St. Johnswort Inchworm  (Aplocera plagiata)
lesser St. John's wort beetle  (Chrysolina hyperici)
greater St. John's wort beetle  (Chrysolina quadrigemina)
St. Johnswort midge  (Zeuxidiplosis giardi)
ragwort flea beetle  (Longitarsus jacobaeae)
ragwort seed fly  (Botanophila seneciella)
slenderflower thistle  (Carduus tenuiflorus)
Scotch thistle  (Onopordum acanthium)
musk thistle leaf beetle  (Psylliodes chalcomera)
root-boring moth  (Eteobalea intermediella)
stem-boring weevil  (Mecinus janthinus)
clearwing moth  (Chamaesphecia tenthrediniformis)
toadflax flower-eating beetle  (Brachypterolus pulicarius)
Toadflax Brocade  (Calophasia lunula)
Italian plumeless thistle  (Carduus pycnocephalus)
blessed milkthistle, milk thistle  (Silybum marianum)
diffuse knapweed  (Centaurea diffusa)
stem-mining fly  (Pegomya euphorbiae)
field bindweed moth  (Tyta luctuosa)
toadflax  (Linaria)
cinnabar moth  (Tyria jacobaeae)
brown knapweed  (Centaurea jacea)
black knapweed  (Centaurea nigra)
houndstongue  (Cynoglossum officinale)
Dalmatian toadflax  (Linaria dalmatica)
smallflower tamarisk  (Tamarix parviflora)
saltcedar  (Tamarix ramosissima)
leafy spurge gall midge  (Spurgia capitigena)
knapweeds  (Centaurea)
fivestamen tamarisk  (Tamarix chinensis)
Mediterranean tamarisk beetle  (Diorhabda elongata)
marsh thistle  (Cirsium palustre)
toadflax root-galling weevil  (Rhinusa linariae)
toadflax seed weevil  (Rhinusa antirrhini)
weevil  (Rhinusa neta)
thistle tortoise beetle  (Cassida rubiginosa)
Canada thistle rust mite  (Aceria anthocoptes)
squarrose knapweed  (Centaurea virgata ssp. squarrosa)
spotted knapweed  (Centaurea stoebe)
scentless chamomile  (Tripleurospermum inodorum)
rush skeletonweed root moth  (Bradyrrhoa gilveolella)
broom seed beetle  (Bruchidius villosus)
biological control (general)
clearwing moth  (Chamaesphecia empiformis)
flea beetle  (Altica carduorum)
broom gall mite  (Aceria genistae)
false peacock fly  (Chaetorellia succinea)
yellow starthistle rust  (Puccinia jaceae var. solstitialis)
gall midge  (Jaapiella ivannikovi)
Tortricid moth  (Lobesia euphorbiana)
tamarisk beetle  (Diorhabda spp.)
Canada thistle stem mining weevil  (Hadroplontus litura)
weed management (general)
red-tailed thistle fly  (Terellia ruficauda)
Skeletonweed gall mite  (Aceria chondrillae)
tansy ragwort  (Jacobaea vulgaris)
northern tamarisk beetle  (Diorhabda carinulata)
leafy spurge  (Euphorbia virgata)
cynipid gall wasps  (Aulacidea acroptilonica)
splendid tamarisk weevil  (Coniatus splendidulus)
Meadow Knapweed  (Centaurea thuillieri)
orange hawkweed  (Pilosella aurantiaca)
St Johnswort aphid  (Aphis chloris)
Scotch broom psyllid  (Arytainilla spartiophila)
hawkweed gall wasp  (Aulacidea subterminalis)
clearwing moth  (Chamaesphecia spp.)
syrphid fly  (Cheilosia grossa)
Black-headed Conch  (Cochylis atricapitana)
thistle leaf beetle  (Lema cyanella)
leaf beetles  (Longitarsus quadriguttatus)
stem-boring weevil  (Mecinus janthiniformis)
stem-mining fly  (Pegomya curticornis)
puccinia rust  (Puccinia acroptili)
scentless chamomile gall midge  (Rhopalomyia tripleurospermi)
weevil  (Microplontus edentulus)
weevil  (Mogulones crucifer)
Drab Looper  (Minoa murinata)
Pear-shaped Weevils  (Omphalapion hookerorum)
yellow hawkweed  (Pilosella caespitosa)
larger tamarisk beetle  (Diorhabda carinata)
leafy spurge stem borer  (Oberea erythrocephala)
mouse-eared hawkweed  (Pilosella officinarum)
 (Eteobalea spp.)
hawkweeds  (Pilosella)
Dalmatian toadflax seed-galling weevil  (Rhinusa dieckmanni)
large thistle weevil  (Cleonis pigra)
 (Chamaesphecia astatiformis)
 (Eteobalea serratella)
ragwort flea beetle - Italian biotype  (Longitarsus jacobaeae Italian biotype)
ragwort flea beetle - Swiss biotype  (Longitarsus jacobaeae Swiss biotype)
Canada thistle bud weevil  (Larinus carlinae)
blacklet  (Cheilosia urbana)
subtropical tamarisk beetle  (Diorhabda sublineata)
gall midge  (Spurgia euphorbiae)
northern tamarisk beetle - Chilik ecotype  (Diorhabda carinulata Chilik ecotype)
northern tamarisk beetle - Fukang ecotype  (Diorhabda carinulata Fukang ecotype)
Meadow knapweed complex  (Centaurea jacea complex)
whiplash hawkweed  (Pilosella flagellaris)
 (Pilosella yellow-flowered hawkweeds)
Mediterranean tamarisk beetle - Crete ecotype  (Diorhabda elongata Crete ecotype)
Black-headed Conch  (Cochylichroa atricapitana)
 (Lobesiodes euphorbiana)