Response of creeping bentgrass (agrostis stolonifera) to fall applications of bensulide and dithiopyr

Stephen E. Hart, Darren W. Lycan, James A. Murphy

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Bensulide and dithiopyr may be used in late summer-fall as a preventative treatment toreduce the potential of annual bluegrass encroachment onto newly constructed or renovated creeping bentgrass putting greens. In 1999, no herbicide treatment reduced bentgrass cover or root mass 1 mo after treatment (MAT). In April of 2000, root mass was lower with bensulide applied at 11.2 kg/ha in October and 22.4 kg/ha applied at both timings or by dithiopyr applied at all rates and timings compared with the untreated bentgrass. In April, bentgrass cover was reduced by bensulide applied at 22.4 kg/ha and dithiopyr applied at 0.4 and 0.8 kg/ha at both timings. In contrast to 1999, significant reductions in root mass were observed 1 MAT in 2000 with bensulide applied at 22.4 kg/ ha and all rates of dithiopyr. Reductions in root mass and bentgrass cover continued into April of 2001 with dithiopyr at 0.4 or 0.8 kg/ha applied at either application timing. Bentgrass cover was lower than the untreated with dithiopyr applied at 0.8 kg/ha until August of 2001. These results suggest that bensulide may be used on creeping bentgrass greens in late summer-fall with a greater degree of safety than dithiopyr.

Original languageEnglish (US)
Pages (from-to)1072-1076
Number of pages5
JournalWeed Technology
Volume18
Issue number4
DOIs
StatePublished - Oct 2004

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Plant Science

Keywords

  • Phytotoxicity
  • Turfgrass coversr

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