INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Current Status of the International Herbicide-Resistant Weed Database

Friday, September 25, 2020

There are currently 514 unique cases (species x site of action) of herbicide resistant weeds globally, with 262 species (152 dicots and 110 monocots). Weeds have evolved resistance to 23 of the 26 known herbicide sites of action and to 167 different herbicides. Herbicide resistant weeds have been reported in 93 crops in 70 countries. The website has 2944 registered users and 623 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.  Friday, September 25, 2020 .  Available  www.weedscience.org Copyright © 1993- 2020 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.