The following 4 new herbicides were tested in canola fields including Butisan Top (quinmerac 12.5% + metazachlor 37.5%); Teridox (dimethachlor 500 EC); Colzor Trio (dimethchlor18.75% + napropamid 18.75% + clomazone 3%) and Lasso (alachlor 48% EC).The trials were set in Tehran, Mazandaran, Fars and Khuzestan provinces, Iran, in a Randomized Complete Block Design with 4 replications and the following treatments: trifluralin (Treflan 48% EC) ppi at 2 L/ha + haloxyfop-R- methyl ester (Galant Super 10.8% EC) at 0.75 L/ha. post ( as standerd recommended treatment); Butisan Top at 2 and 3 L/ha. pre.; Teridox at 2 and 3 L/ha., pre.; Colzor Trio at 3.5 and 4 L/ha., pre.; Lasso at 5L/ha, pre.; 9- weed free check. Half of each plot was used as weedy check. Results showed that in Tehran, all treatments caused yield increase, but the new herbicides caused much higher yields. In Mazandaran, the new herbicides controlled Sinapis arvensis between 36-50% which was much higher than the results for Treflan + Galant Super. In Fars, the new herbicides did not show any satisfactory results. In Khuzestan, Butisan Top at 3L/ha and Lasso produced highest yields, and Teridox at 2 L/ha gave satisfactory results. General outcome of the present trials is recommendation of Butisan Top at 2-3 L/ha and Teridox at 2-3 L/ha for weed control in canola fields.