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

Monday, May 27, 2024

There are currently 531 unique cases (species x site of action) of herbicide resistant weeds globally, with 272 species (155 dicots and 117 monocots). Weeds have evolved resistance to 21 of the 31 known herbicide sites of action and to 168 different herbicides. Herbicide resistant weeds have been reported in 100 crops in 72 countries. The website has 3302 registered users and 703 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.  Monday, May 27, 2024 .  Available  www.weedscience.org Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.