International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
RED RICE (Oryza sativa var. sylvatica)

with GROUP B/2 resistance: (ALS INHIBITORS)
Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)

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Chemical FamilyExample HerbicideResistance Level
ImidazolinonesImazethapyr Resistant > 10 fold
PyrimidinylthiobenzoatesBispyribac-Na Intermediate Resistance < 10 fold
SulfonylureasChlorsulfuron Not Determined
TriazolopyrimidinesChloransulam-methyl Not Determined
SulfonylaminocarbonyltriazolinoneFlucarbazone-Na Not Determined

Both Gly654Glu and Val669Met substitutions were identified, but research by Shivrain et al. 2010 suggests the latter substitution confers little or no resistance. 


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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Sunday, March 18, 2018 .  Available
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