Glyphosate, Sethoxydim, Fluazifop-P and Haloxyfop-methyl, applied as single post-emergence applications, were evaluated for t h e control of Panicum repens L. (torpedograss), under both glasshouse and field conditions. Each herbicide spray solution was incorporated with the non-ionic surfactant (AgraI-90) a t 0.1% (vlv). All four herbicides controlled P. repens to varying degrees. In general, giyphosate and sethoxydim a t 2.0 and 4.0 kg a.i/ha achieved the highest level of control, suppressing

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... 0-95% of weed regrowth 30 days after treatment and killing 90-95% rhizome buds. The performance of fluazifop and haloxyfop, as measured by ability for regrowth suppression was significantly less a t these rates, although these herbicides also caused 90-95% kill of rhizome buds. At c 1.0 k g h a the four herbicides produced insufficient regrowth suppression and bud kill and could not adequately control well-established field infestations. Of the four herbicides tested, haloxyfop-methyl was the least phytotoxic to P. repens.