Submitted to: Western Society of Weed Science Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: December 1, 1996
Publication Date: N/A
Technical Abstract: In trials conducted from 1993 to 1996, sulfentrazone applied preemergence to furrow-irrigated spearmint at 0.25 to 0.5 lb/A did not reduce spearmint hay or oil yields compared to a standard treatment of terbacil. Sulfentrazone applied to emerged spearmint caused necrosis and stunting. Sulfentrazone controlled redroot pigweed, common lambsquarters, and kochia greater that 98%. In trials on Scotch spearmint, sulfentrazone applied preemergence at 0.5 lb/A followed by bentazon applied postemergence reduced yellow nutsedge biomass by greater than 90% in 1995 and 1996 compared to nontreated checks. In 1995 and 1996, sulfentrazone was tested on newly planted asparagus grown on a Warden sandy loam soil containing 1% organic matter. Sulfentrazone applied preemergence at 0.5 and 1.0 lb/A to newly planted asparagus crowns in 1995 controlled common lambsquarters and common groundsel 100%, but severely injured asparagus by late June and July. Sulfentrazone applied preemergence to newly planted asparagus crowns at 0.25 and 0.38 lb/A in 1996 controlled common lambsquarters greater than 98% and did not injure asparagus. Sulfentrazone applied preemergence at 0.5 and 1.0 lb/A to sprinkler-irrigated established asparagus in 1995 and 1996 did not injure asparagus or reduce asparagus yield compared to a standard treatment of trifluralin plus metribuzin in 1995 or trifluralin plus linuron in 1996. In 1995 and 1996, sulfentrazone applied at 0.5 and 1.0 lb/A controlled common lambsquarters, hairy nightshade, common groundsel, and Russian thistle from 94 to 100%.