©2025 WeedScience.org, Dr. Ian Heap 01/05/2025

PLEASE NOTE
The graph does not necessarily plot multiple resistance in the same individual plant.
Resistance to different SOA's may be found in separate populations, even in separate countries,
this chart presents the cumulative number of SOA's recorded globally for a species.

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Sunday, January 5, 2025 .  Available  www.weedscience.org
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