INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

BARNYARDGRASS (Echinochloa crus-galli var. crus-galli)

with GROUP B/2 resistance: (INHIBITION OF ACETOLACTATE SYNTHASE )
Inhibition of Acetolactate Synthase
MUTATION: ALANINE 122 to VALINE







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Chemical FamilyExample HerbicideResistance Level
ImidazolinonesImazethapyr Resistant > 10 fold
Pyrimidinyl benzoates Bispyribac-Na Susceptible
SulfonylureasChlorsulfuron Not Determined
Triazolopyrimidine - Type 1 Chloransulam-methyl Susceptible
Triazolinones Flucarbazone-Na Not Determined

NOTE
There is evidence (see Riar et al. 2013) that the biotype with this mutation also possesses another resistance mechanisms.

REFERENCES

This case was entered by Patrick Tranel Email: tranel@illinois.edu

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