Warren Roberts
Oklahoma State University–Stillwater
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Featured researches published by Warren Roberts.
Weed Technology | 2007
James W. Shrefler; Lynn P. Brandenberger; Charles L. Webber; Warren Roberts; Mark E. Payton; Lynda K. Wells
Watermelon growers rotate crops to prevent problems, but weed populations in new fields may hold unexpected control challenges. Having effective POST herbicides would provide growers an opportunity to respond to emerging weeds on an as-needed basis. To address this need, field studies were conducted over 4 yr in Oklahoma to determine efficacy and crop response of POST halosulfuron applications to direct-seeded watermelon that received PRE application of ethalfluralin at 840 g/ha. At 5 wk after crop emergence (WAE) halosulfuron was applied at 18, 27, 36, and 54 g/ha. The 27 g/ha rate was also applied at 1, 2, 3 and 7 WAE. Halosulfuron applications made 5 WAE did not provide acceptable (> 80%) control of pigweeds and cutleaf groundcherry regardless of rate. Applications made 1 WAE provided significantly better control of pigweeds and cutleaf groundcherry than did later applications. Halosulfuron treatments of 36 and 54 g/ha made 5 WAE and of 27 g/ha made 1, 2 and 3 WAE did not result in significant yield increases compared with the hand-weeded check. These studies show that POST halosulfuron application may be a useful treatment for direct-seeded watermelon. This option would enable more judicious use of herbicides and possible reduction in production costs. Nomenclature: Halosulfuron; Palmer amaranth, Amaranthus palmeri S. Wats. AMAPA; tumble pigweed, Amaranthus albus L. AMAAL; cutleaf groundcherry, Physalis angulata L. PHYAN; eclipta, Eclipta prostrata L. ECLAL; watermelon, Citrullus lanatus (Thunb.) Matsumura & Nakai var. lanatus ‘Jubilee’, ‘XIT 101’.
Pest Management Science | 2002
J. V. Edelson; Jim Duthie; Warren Roberts
Hortscience | 2006
J.K. Collins; Penelope Perkins-Veazie; Warren Roberts
Horttechnology | 1999
Warren Roberts; James W. Shrefler; J. Duthie; J. V. Edelson; Bob Cartwright; Nancy Roe
Hortscience | 1990
Jeffrey A. Anderson; Greg McCollum; Warren Roberts
2008 Annual Meeting, February 2-6, 2008, Dallas, Texas | 2008
Shida Rastegari Henneberry; Merritt J. Taylor; Brian E. Whitacre; Haerani N. Agustini; Joao E. Mutondo; Warren Roberts
Hortscience | 2004
Penelope Perkins-Veazie; J.K. Collins; Warren Roberts
Horttechnology | 2002
Tom Vare Williams; Warren Roberts
Acta Horticulturae | 2008
Merritt J. Taylor; Benny D. Bruton; Wayne W. Fish; Warren Roberts
Hortscience | 2006
Merritt J. Taylor; Benny D. Bruton; Wayne W. Fish; Warren Roberts