Absorption, Translocation, and Metabolism of Sulfometuron in Centipedegrass (Eremochloa ophiuroides) and Bahiagrass (Paspalum notatum)

• Published in: Weed science 1989-01, Vol.37 (1), p.42-46
• Main Authors: Baird, James H., Wilcut, John W., Wehtje, Glenn R., Dickens, Ray, Sharpe, Sam
• Format: Article
• Language: English
• Subjects: absorcion; absorcion de substancias nutritivas; absorption; absorption de substances nutritives; Acid soils; Agricultural soils; aplicacion foliar; application foliaire; Biological and medical sciences; Chemical control; chemical resistance; eremochloa ophiuroides; foliar application; Fundamental and applied biological sciences. Psychology; herbicidas; herbicide; Herbicide resistance; Herbicides; Leaves; Metabolism; metabolisme; metabolismo; nutrient uptake; Parasitic plants. Weeds; paspalum notatum; Physiology, Chemistry and Biochemistry; Phytopathology. Animal pests. Plant and forest protection; Plant roots; Plants; Radioactive decay; Regrowth; resistance aux produits chimiques; resistencia quimica; translocacion; translocation; urea; uree; Weeds
• ISSN: 0043-1745; 1550-2759
• DOI: 10.1017/S004317450005582X

Sulfometuron, when applied as a foliar and/or soil application, prevented regrowth of bahiagrass. Sulfometuron application did not reduce regrowth of centipedegrass regardless of method of application. Sulfometuron was absorbed by the roots and foliage of centipedegrass and bahiagrass. Symplasmic translocation of the herbicide was evident in both species. Translocation of foliar-applied sulfometuron increased from approximately 1% at 48 h after application to 23% at 72 h in bahiagrass. Metabolism of sulfometuron was greater in centipedegrass (69% of foliar-applied, 10% of root-applied) at 72 h after application than in bahiagrass (30% of foliar-applied and 4% of root-applied). Tolerance of centipedegrass to sulfometuron appeared to be related to a high degree of herbicide metabolism in this species.