INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
Herbicide-Resistant Weeds by Site of Action

This table lists the number of species resistant to each site of action. Please note that many species have evolved resistance to more than one site of action, so the grand total represents unique cases of resistance, not the number of species.
(click on a column header to sort, hover mouse over links for more information or click on a links for details)
HRAC GroupLegacy HRAC GroupSite of ActionExample HerbicideDicotsMonocotsTotal
    267246513
2B 10565170
5C1 C2 533487
9G 272956
1A 05050
4O 33841
22D 221032
14E 10414
15K3 N 21113
3K1 21012
34F3 156
10H 156
12F1 415
6C3 314
29L 044
27F2 303
13F4 033
0Z 033
23K2 011
0Z 101
0Z 011
0Z 011

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Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Tuesday, August 9, 2022 .  Available  www.weedscience.org Copyright © 1993- 2022 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.