田间试验表明,在玉米出苗后3～5叶期、稗草2～5叶期时施用50%二氯喹啉酸WP450～600g(a.i)/hm2,对玉米田禾本科杂草具有较好的防除效果。施药后40d对杂草株防效可达90%以上,鲜重防效达92%,对玉米安全性好。 Field experiments showed that 50% quinclorac WP450 ~ 600g (ai) / hm2 was applied to barnyardgrass at 2 ~ 5 leaf stage at 3 ~ 5 leaf stage after maize emergence and had good control on weeds in corn field effect. 40 d after spraying the weed control effect of up to 90%, fresh weight control effect of 92%, good safety of corn.