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
    272249521
2B 10264166
5C1 512374
9G 262753
1A 04949
4O 33841
22D 221032
5C2 111829
14E 10313
3K1 21012
15N 01010
15K3 358
34F3 156
12F1 415
6C3 314
10H 044
27F2 303
29L 033
0Z 033
3F4 022
23K2 011
0Z 011
0Z 011
0Z 101

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, April 15, 2021 .  Available  www.weedscience.org Copyright © 1993- 2021 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.