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
2B 10465169
5C1 C2 533487
9G 272855
1A 05050
4O 33841
22D 221032
15K3 N 31114
14E 10313
3K1 21012
34F3 156
12F1 415
10H 145
6C3 314
27F2 303
13F4 033
29L 033
0Z 033
23K2 011
0Z 101
0Z 011
0Z 011

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.  Sunday, December 5, 2021 .  Available Copyright © 1993- 2021 All rights reserved. Fair use of this material is encouraged. Proper citation is requested.