Herbicide Options for the Management of Navua Sedge (Cyperus aromaticus) Plants Established through Seeds

Navua sedge is a difficult-to-control perennial in north Australian farming systems, including fallow fields, pastures, and along roadsides fencelines. A set of pot trials were conducted to evaluate the performance different herbicides when used alone or mixtures on sizes plants, adjuvant treatments rainfastness halosulfuron-methyl. Glyphosate at 1080 g·ha−1, halosulforon-methyl 49 paraquat 600 g·ha−1 provided complete control 6-leaf stage. Azimsulfuron 20 resulted 18% 39% survival 14 18 leaf stage 60–70 respectively. Compared with nontreated, this herbicide treatment suppressed plant biomass by 99.6% 93%, respectively, surviving plants did not produce seed heads. sole application azimsulfuron, glyphosate, halosulfuron-methyl was effective very large (140–150 stage; 40–42 cm tall) sedge. However, mixture any two currently adjuvants 0.5 1% concentrations, use non-ionic high concentrations (i.e., 2% ActivatorTM, HastenTM, UptakeTM) improved halosulfuron-methy applied This study identified (e.g., azimsulfuron-based combinations) for management