INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
select
Weeds Resistant to Very Long-Chain Fatty Acid Synthesis inhibitors HRAC Group 15 (Legacy K3 N)
by species and country
Weeds Resistant to Very Long-Chain Fatty Acid Synthesis inhibitors HRAC Group 15 (Legacy K3 N)
by species and country
Drag a column header and drop it here to group by that column
Weeds Resistant to Very Long-Chain Fatty Acid Synthesis inhibitors HRAC Group 15 (Legacy K3 N)
by species and country
#SpeciesCountryFirst Year
1 Alopecurus myosuroides
Blackgrass 		2007 - Germany *Multiple - 4 SOA's
2011 - Sweden *Multiple - 3 SOA's
2020 - France
20076Alopecurus myosuroidesBlackgrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
2 Amaranthus palmeri
Palmer Amaranth 		2016 - United States (Arkansas) *Multiple - 5 SOA's
2017 - United States (Arkansas)
201614Amaranthus palmeriPalmer AmaranthK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
3 Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp 		2016 - United States (Illinois)
2016219Amaranthus tuberculatus (=A. rudis)Tall WaterhempK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
4 Avena fatua
Wild Oat 		1989 - Canada (Alberta) *Multiple - 2 SOA's
1990 - United States (Montana) *Multiple - 2 SOA's
1993 - United States (Idaho) *Multiple - 2 SOA's
1996 - Canada (Saskatchewan)
1996 - Canada (Saskatchewan) *Multiple - 3 SOA's
1997 - Canada (Manitoba)
1997 - Canada (Manitoba) *Multiple - 4 SOA's
1998 - Canada (Alberta) *Multiple - 3 SOA's
2015 - Canada (Manitoba) *Multiple - 4 SOA's
 		198928Avena fatuaWild OatK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
5 Echinochloa crus-galli var. crus-galli
Barnyardgrass 		1993 - China
1993 - China
1998 - Thailand *Multiple - 2 SOA's
2000 - United States (California) *Multiple - 2 SOA's
2005 - Philippines *Multiple - 2 SOA's
 		199379Echinochloa crus-galli var. crus-galliBarnyardgrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
6 Echinochloa oryzoides
Early Watergrass 		2000 - United States (California)
2000261Echinochloa oryzoidesEarly WatergrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
7 Echinochloa phyllopogon (=E. oryzicola)
Late Watergrass 		1998 - United States (California)
2000 - United States (California) *Multiple - 2 SOA's
 		1998178Echinochloa phyllopogon (=E. oryzicola)Late WatergrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
8 Lolium perenne ssp. multiflorum
Italian Ryegrass 		2005 - United States (Idaho) *Multiple - 3 SOA's
2018 - France
2018 - United Kingdom
2018 - United States (Oregon)
2018 - United States (Washington)
2005110Lolium perenne ssp. multiflorumItalian RyegrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
9 Lolium rigidum
Rigid Ryegrass 		1982 - Australia (South Australia) *Multiple - 6 SOA's
1984 - Australia (South Australia)
2015 - Australia (New South Wales )
2015 - Australia (Victoria)
1982112Lolium rigidumRigid RyegrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
10 Poa annua
Annual Bluegrass 		1994 - United States (Oregon)
1994130Poa annuaAnnual BluegrassK3 N1815Very Long-Chain Fatty Acid Synthesis inhibitors
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Thursday, July 3, 2025 .  Available  www.weedscience.org Copyright © 1993- 2025 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.