Montana Noxious Weeds and Biocontrols

Canada Thistle, Cirsium arvense
Common Tansy, Tanacetum vulgare
Dalmatian Toadflax, Linaria dalmatica
– Weevil, Mecinus janthinus
Houndstongue, Cynoglossum officinale
Leafy Spurge, Euphorbia esula
– Hawk Moth, Hyles euphorbiae
– Hawk Moth Caterpillar, Hyles euphorbiae
– Brown Flea Beetle, Aphthona nigriscutis
– Black Flea Beetle, Aphthona lacertosa
Oxeye Daisy, Chrysanthemum leucanthemum vulgare
Purple Loosestrife, Lythrum salicaria
Spotted Knapweed, Centaurea stoebe
– Flower Weevil, Larinus minutus
– Root Weevil, Cyphocleonus achates
– Root Moth, Agapeta zoegana
St. Johnswort, Hypericum perforatum
Sulphur Cinquefoil, Potentilla recta

Montana New Invaders

Dyer’s Woad, Isatis tinctoria
Flowering Rush, Butomus umbellatus
Blueweed, Echium vulgare
Rush Skeletonweed, Chondrilla juncea
Japanese Knotweed, Polygonum cuspidatum
Eurasian Water Milfoil, Myriophyllum spicatum
Meadow Hawkweed, Hieracium caespitosum
Orange Hawkweed, Hieracium aurantiacum
Scotch Broom, Cytisus scoparius
Yellow Starthistle, Centaurea solstitialis
Yellowflag Iris, Iris pseudacorus