INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

PALMER AMARANTH (Amaranthus palmeri)

with GROUP B/2 resistance: (ALS INHIBITORS)
Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)
MUTATION: SERINE 653 to ASPARAGINE







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Chemical FamilyExample HerbicideResistance Level
ImidazolinonesImazethapyr Not Determined
PyrimidinylthiobenzoatesBispyribac-Na Not Determined
SulfonylureasChlorsulfuron Not Determined
TriazolopyrimidinesChloransulam-methyl Not Determined
SulfonylaminocarbonyltriazolinoneFlucarbazone-Na Not Determined

NOTE

The Molin et al. 2016 paper reported this mutation in Palmer amaranth but it was not characterized. 

Berger et al. 2016 also identified but did not characterize this mutation. 

The mutation was also identified by Larran et al. 2017, but was present within a segregating population, so the conferred levels of resistance to the different chemical families are unknown. 

Mutation also identified by Singh et al. 2018, but present in plant that also had Trp574Leu.


REFERENCES

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


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