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.

• Ian Heap.  Director of the International Survey of Herbicide-Resistant Weeds.
  IanHeap@weedscience.org
• Caio Rossi. Chairman of the Herbicide Resistance Action Committee.
  caio.rossi@corteva.com

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.

• Research Comments : Research@weedscience.org
• Website/Technical Problems : Support@weedscience.org
• Other Comments : Comments@weedscience.org