International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
CATCHWEED BEDSTRAW (Galium aparine)

with GROUP B/2 resistance: (INHIBITION OF ACETOLACTATE SYNTHASE )
Inhibition of Acetolactate Synthase
MUTATION: PROLINE 197 to LEUCINE







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Chemical FamilyExample HerbicideResistance Level
ImidazolinonesImazethapyr Intermediate Resistance < 10 fold
Pyrimidinyl benzoates Bispyribac-Na Intermediate Resistance < 10 fold
SulfonylureasChlorsulfuron Resistant > 10 fold
Triazolopyrimidine - Type 1 Chloransulam-methyl Intermediate Resistance < 10 fold
Triazolinones Flucarbazone-Na Intermediate Resistance < 10 fold

NOTE
R/S ratios not quantified for all herbicides, but plants with this mutation survived 4x dose of one herbicide from each class. 

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.  Thursday, October 21, 2021 .  Available  www.weedscience.org
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