International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
select
Herbicide Resistant Weeds in Oregon, United States.
#YearSpeciesSite of ActionActivesContacts
1 320Italian Ryegrass1987Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Oregon)
OregonOR ACCase inhibitors (A/1) ACCase inhibitors (A/1) diclofop-methyl Ian Heap
2 475Wild Oat1990Avena fatua
Wild Oat
United States
(Oregon)
OregonOR Microtubule inhibitors (K1/3) Microtubule inhibitors (K1/3) propyzamide = pronamide Steven Seefeldt
3 319Wild Oat1990Avena fatua
Wild Oat
United States
(Oregon)
Oregon  ACCase inhibitors (A/1) ACCase inhibitors (A/1) diclofop-methyl, fenoxaprop-P-ethyl Ian Heap
4 1173Russian-thistle1993Salsola tragus
Russian-thistle
United States
(Oregon)
OregonOR ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron, metsulfuron-methyl, triasulfuron Daniel Ball
5 1174Prickly Lettuce1993Lactuca serriola
Prickly Lettuce
United States
(Oregon)
OregonOR ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron, metsulfuron-methyl, triasulfuron Daniel Ball
6 1175Kochia1993Kochia scoparia
Kochia
United States
(Oregon)
OregonOR ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron, metsulfuron-methyl, triasulfuron Daniel Ball
7 321Redroot Pigweed1994Amaranthus retroflexus
Redroot Pigweed
United States
(Oregon)
OregonOR Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) terbacil Ian Heap
8 334Annual Bluegrass1994Poa annua
Annual Bluegrass
United States
(Oregon)
OregonOR Lipid Inhibitors (N/16) Lipid Inhibitors (N/16) ethofumesate Ian Heap
9 336Annual Bluegrass1994Poa annua
Annual Bluegrass
United States
(Oregon)
OregonOR PSII inhibitor (Ureas and amides) (C2/7) PSII inhibitor (Ureas and amides) (C2/7) diuron Ian Heap
10 338Annual Bluegrass1994Poa annua
Annual Bluegrass
United States
(Oregon)
OregonOR Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Ian Heap
11 322Common Groundsel1995Senecio vulgaris
Common Groundsel
United States
(Oregon)
OregonOR PSII inhibitors (Nitriles) (C3/6) PSII inhibitors (Nitriles) (C3/6) bromoxynil Ian Heap
12 1112Downy Brome (Cheatgrass)1997Bromus tectorum
Downy Brome (Cheatgrass)
United States
(Oregon)
OregonOR ALS inhibitors (B/2) ALS inhibitors (B/2) imazamox, primisulfuron-methyl, sulfosulfuron Daniel Ball, George Mueuller-Warrant, Kee-Woong Park
13 5111Smallseed Flaxfalse1999Camelina microcarpa
Smallseed Flaxfalse
United States
(Oregon)
Oregon  ALS inhibitors (B/2) ALS inhibitors (B/2) chlorsulfuron, metsulfuron-methyl Brad Hanson
14 5249Italian Ryegrass2004Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Oregon)
Oregon  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Jed Colquhoun
15 5375Downy Brome (Cheatgrass)2005Bromus tectorum
Downy Brome (Cheatgrass)
United States
(Oregon)
Oregon  ACCase inhibitors (A/1) ACCase inhibitors (A/1) clethodim, fluazifop-P-butyl, quizalofop-P-ethyl, sethoxydim Daniel Ball
16 5366Shepherd's-purse2007Capsella bursa-pastoris
Shepherd's-purse
United States
(Oregon)
OregonOR Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) hexazinone, metribuzin Alejandro Perez-Jones, Carol Mallory-Smith
17 5564Italian Ryegrass2010Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Oregon)
Oregon  EPSP synthase inhibitors (G/9), Glutamine synthase inhibitors (H/10) Multiple Resistance: 2 Sites of Action
EPSP synthase inhibitors (G/9)
Glutamine synthase inhibitors (H/10)
glufosinate-ammonium, glyphosate Carol Mallory-Smith, Wilson Avila Garcia
18 9944Kochia2014Kochia scoparia
Kochia
United States
(Oregon)
Oregon  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Don Morishita, Prashant Jha, Joel Felix
19 13055Russian-thistle2016Salsola tragus
Russian-thistle
United States
(Oregon)
Oregon  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Carol Mallory-Smith
Contributing Weed Scientists
1
Page size:
select
Page: of 1
Items 1 to 6 of 6
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, October 18, 2018 .  Available  www.weedscience.org
Copyright © 1993- 2018 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.