This product is a herbicide of picolinic acid. Used for weeding in rice fields and lawns, with 0.06kg(ai)/ha pre-emergence application and 0.12kg(ai)/ha post-emergence (barnyard grass 1.5 leaf stage) application, which can prevent and control barnyard grass, duck diffusa, sedge, Annual weeds such as Jijiecai and Alisma angustifolia. But it cannot prevent firefly, water sedge, melon pelt and wild mushroom. The herbicide's herbicidal activity is not affected by changes in environmental factors, and is safe for rice, with a lasting period of 80 days. This product is applied before the lawn, the dosage is 0.36~0.50kg(ai)/ha, which can prevent crabgrass, Annual gramineous weeds such as purple crabgrass and annual broad-leaved weeds such as ball-sequelae sedum, sedum sedum, and lacquered mushroom grass.