1. Residues in the soil are relatively large, and it is easy to produce phytotoxicity to the back hoe. The back hoe can be used to grow rice, corn and sorghum.

2. Solanaceae (tobacco, potato, pepper, etc.), Umbelliferae (carrot, celery), Polygonaceae (spinach, beet) Malvaceae, Cucurbitaceae (various melons), Leguminosae, Asteraceae, Rotary Flowering plants are sensitive to the drug.

3. It can be mixed with herbicidal dan, bensulfuron-methyl, pyrazosulfuron-methyl, propanil, cyhalofop-butyl, etc. to expand weed spectrum.

4. Excessive use of quinclorac in some areas all year round, resulting in cumulative phytotoxicity in the field.