About US

The International Survey of Herbicide Resistant Weeds is a collaborative effort between weed scientists in over 80 countries.  Our main aim is to maintain scientific accuracy in the reporting of herbicide resistant weeds globally.  This collaborative effort is supported by government, academic, and industry weed scientists worldwide.  This project is funded by the Global Herbicide Resistance Action Committee and CropLife International.

Click Here if you need to edit your own Contact Information .  If you are a weed scientist and you want to register then please Register .  Once verified (usually within two days) you will be issued a password and you may then enter data directly into the database.  Please direct general weed control questions to your local university extension agent or weed specialist.


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, July 25, 2024 .  Available Copyright © 1993- 2024 All rights reserved. Fair use of this material is encouraged. Proper citation is requested.