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)
MUTATION: GLYCINE 654 to GLUTAMATE







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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

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

REFERENCES

This case was entered by Patrick Tranel Email: tranel@illinois.edu
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, October 23, 2017 .  Available  www.weedscience.org
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