CROWN DAISY (Chrysanthemum coronarium)
with GROUP B/2 resistance: (ALS INHIBITORS)
Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)
MUTATION: PROLINE 197 to SERINE


Crown daisy (Chrysanthemum coronarium) is a dicot plant in the asteraceae family. A single amino acid substitution from Proline 197 to Serine has led to resistance to ALS inhibitors as indicated in the table below.

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Crown daisy
ChemistryExampleResistance
ImidazolinonesImazethapyrNot Determined
PyrimidinylthiobenzoatesBispyribac-NaNot Determined
SulfonylureasChlorsulfuronNot Determined
TriazolopyrimidinesChloransulam-methylNot Determined
SulfonylaminocarbonyltriazolinoneFlucarbazone-NaNot Determined
NOTES
REFERENCES
Tal, A. and B. Rubin (2004). Occurrence of resistant Chrysanthemum coronarium to ALS inhibiting herbicides in Israel Resistant Pest Management Newsletter , 13 (2) : 31-33.
This case was entered by Patrick Tranel

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