Quinclorac is an herbicide used primarily to control crabgrass.

Most[citation needed] lawn maintenance companies use the product for the control of annual grass weeds like crabgrass.

[5] Quinclorac is not approved to use in the European Union due to toxicity concerns.

[6][7] Resistance to quinclorac is of concern in soybean cultivation.

In rice, Graminaceous resistance is produced by the cytochrome enzyme CYP81A6.