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Current Status of the International Herbicide-Resistant Weed Database

Wednesday, May 12, 2021

There are currently 522 unique cases (species x site of action) of herbicide resistant weeds globally, with 263 species (152 dicots and 111 monocots). Weeds have evolved resistance to 23 of the 26 known herbicide sites of action and to 164 different herbicides. Herbicide resistant weeds have been reported in 94 crops in 71 countries. The website has 3035 registered users and 645 weed scientists have contributed new cases of herbicide resistant weeds. View Recent Additions, Site of Action Summary, or the Herbicide Classification System.

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.  Wednesday, May 12, 2021 .  Available Copyright © 1993- 2021 All rights reserved. Fair use of this material is encouraged. Proper citation is requested.