International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Weeds in Washington, United States.
#YearSpeciesSite of ActionActivesContacts
1 386Common Groundsel1970Senecio vulgaris
Common Groundsel
United States
(Washington)
Washington  Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) simazine Rick Boydston
2 231Russian-thistle1987Salsola tragus
Russian-thistle
United States
(Washington)
WashingtonWA ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron Donn Thill
3 515Yellow Starthistle1988Centaurea solstitialis
Yellow Starthistle
United States
(Washington)
WashingtonWA Synthetic Auxins (O/4) Synthetic Auxins (O/4) picloram Steven Seefeldt
4 517Kochia1989Kochia scoparia
Kochia
United States
(Washington)
WashingtonWA ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron Steven Seefeldt
5 521Wild Oat1991Avena fatua
Wild Oat
United States
(Washington)
WashingtonWA ACCase inhibitors (A/1) ACCase inhibitors (A/1) diclofop-methyl Steven Seefeldt
6 331Powell Amaranth1992Amaranthus powellii
Powell Amaranth
United States
(Washington)
Washington  Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) terbacil Kassim Al-Khatib, Rick Boydston
7 518Prickly Lettuce1993Lactuca serriola
Prickly Lettuce
United States
(Washington)
WashingtonWA ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron Steven Seefeldt
8 5186Spiny Sowthistle2000Sonchus asper
Spiny Sowthistle
United States
(Washington)
Washington  ALS inhibitors (B/2) ALS inhibitors (B/2) imazamox, thifensulfuron-methyl Kee-Woong Park
9 5328Prickly Lettuce2007Lactuca serriola
Prickly Lettuce
United States
(Washington)
Washington  Synthetic Auxins (O/4) Synthetic Auxins (O/4) 2,4-D, dicamba, MCPA Ian Burke
10 5667Redroot Pigweed2010Amaranthus retroflexus
Redroot Pigweed
United States
(Washington)
WashingtonWashington Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) metribuzin, terbacil Rick Boydston
11 5668Common Lambsquarters2010Chenopodium album
Common Lambsquarters
United States
(Washington)
WashingtonWashington Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) metribuzin, terbacil Rick Boydston
12 10987Mayweed Chamomile2010Anthemis cotula
Mayweed Chamomile
United States
(Washington)
Washington  ALS inhibitors (B/2) ALS inhibitors (B/2) cloransulam-methyl, imazethapyr, thifensulfuron-methyl, tribenuron-methyl Alejandro Perez-Jones, Carol Mallory-Smith
Contributing Weed Scientists
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, August 16, 2018 .  Available  www.weedscience.org
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