Abstract
Abstract Three preemergence herbicides [S-(0, 0-Diisopropyl phosphorodithioate) ester of N-(2-mercaptoethyl) benzenesulfonamide (bensulide) at 8.4 and 15.7 kg/ha, Dimethyl tetrachloroterephthalate (DCPA) at 11.8 and 16.8 kg/ha, and 2-tert-butyl-4-(2,4 dichloro-5-isopropoxyphenyl)-Δ2l,3,4-oxadiazolin-5-one (oxadiazon) at 2.2, 4.5, and 9 kg/ha] were applied to plugs of Kentucky bluegrass (Poa pratensis L. cvs. Baron, Enmundi, Newport, and Park) in the greenhouse. Bensulide and oxadiazon reduced root weight, but there were no cultivar differences. Cultivar differences in response to oxadiazon were observed for rhizome weight, rhizome length, and turfgrass quality, with ‘Newport’ and ‘Baron’ damaged more by oxadiazon than ‘Park’ and ‘Enmundi’. There were no cultivar differences in rhizome weight, rhizome length, and quality in response to bensulide or DCPA.
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