Quinclorac Explained

Quinclorac is an organic compound with the formula . A colorless solid, it is soluble in hydrocarbons and alcohols. The compound is the carboxylic acid of 3,7-dichloroquinoline.

Applications

Quinclorac is an herbicide used primarily to control crabgrass.^[1] It is found in some household herbicides for lawn use. Most lawn maintenance companies use the product for the control of annual grass weeds like crabgrass.

Quinclorac is a synthetic auxin.^{[2] [3]} Heap considers it to also have a cellulose herbicide action,^[4] although some studies show quinclorac to have no cellulose action.^[5]

Regulation and registration

Quinclorac is not approved to use in the European Union due to toxicity concerns.^{[6] [7]}

Resistance

Resistance to quinclorac is of concern in soybean cultivation. In rice, Graminaceous resistance is produced by the cytochrome enzyme CYP81A6.^[8]

Further reading

• Mini Review. 10.4161/psb.6.8.15793. The use of FTIR spectroscopy to monitor modifications in plant cell wall architecture caused by cellulose biosynthesis inhibitors. 2011 . Alonso-Simón . Ana . García-Angulo . Penélope . Mélida . Hugo . Encina . Antonio . Álvarez . Jesús M. . Acebes . José L. . Plant Signaling & Behavior . 6 . 8 . 1104–1110 . 21791979 . 3260703 . 2011PlSiB...6.1104A .

References

1. Book: 10.1002/14356007.o28_o01 . Weed Control, 2. Individual Herbicides . Ullmann's Encyclopedia of Industrial Chemistry . 2011 . Müller . Franz . Applebyki . Arnold P. . 9783527303854 .
2. Grossmann . Klaus . 1998 . Quinclorac belongs to a new class of highly selective auxin herbicides . Weed Science. 46 . 6 . 707–716. 10.1017/S004317450008975X . 89297943 .
3. Grossmann . Klaus . Kwiatkowski . Jacek . The Mechanism of Quinclorac Selectivity in Grasses . Pesticide Biochemistry and Physiology . 66 . 2 . 2000 . 0048-3575 . 10.1006/pest.1999.2461 . 83–91 . 84092985.
4. Web site: Ian. List of Herbicide Resistant Weeds by Herbicide Mode of Action (L/26). Heap. International Survey of Herbicide Resistant Weeds . . en . 2021-03-14.
5. Tresch . Stefan . Grossmann . Klaus . Quinclorac does not inhibit cellulose (cell wall) biosynthesis in sensitive barnyard grass and maize roots . Pesticide Biochemistry and Physiology. 75 . 3 . 2003 . 0048-3575 . 10.1016/s0048-3575(03)00013-0 . 73–78 . 84212641. Tresch . Stefan . Grossmann . Klaus . Erratum to "Quinclorac does not inhibit cellulose (cell wall) biosynthesis in sensitive barnyard grass and maize roots" . Pesticide Biochemistry and Physiology . 76 . 2 . 2003 . 0048-3575 . 10.1016/s0048-3575(03)00064-6 . 70–71 . 84794877. free .
6. Web site: Quinclorac .
7. Web site: Quinclorac (Ref: BAS 514H) .
8. Elsevier BV. Journal of Biological Chemistry. 10.1074/jbc.rev120.013572. Mechanisms of Evolved Herbicide Resistance . 2020 . free . Gaines . Todd A. . Duke . Stephen O. . Morran . Sarah . Rigon . Carlos A.G. . Tranel . Patrick J. . Küpper . Anita . Dayan . Franck E. . 295 . 30 . 10307–10330 . 32430396 . 7383398 .