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Sugarcane cultivar response to glyphosate and trinexapac-ethyl ripeners in Louisiana

Author

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  • Douglas J Spaunhorst
  • James R Todd
  • Anna L Hale

Abstract

Sugarcane ripening in Louisiana is necessary to ensure adequate sucrose levels in early-season harvested sugarcane. The response of nine sugarcane cultivar’s yield components to glyphosate and trinexapac-ethyl ripeners was determined in field trials. Glyphosate (210 g ae ha-1) and trinexapac-ethyl (200 g ai ha-1) treatments failed to increase sucrose yields more than non-ripened sugarcane. Sugarcane ripened with glyphosate or trinexapac-ethyl increased theoretical recoverable sucrose (TRS) 4 to 12% more than non-ripened sugarcane in seven out of nine cultivars, but greater TRS values were counterpoised by lower sugarcane stalk weight. An unintentional consequence of reduced late-season vegetative growth may benefit growers by allowing them to harvest more sugarcane hectares to meet their daily load quota and exposes fewer hectares to a freeze event. The cultivars HoCP 00–950, Ho 09–804, and HoCP 09–840 were not responsive to glyphosate or trinexapac-ethyl ripeners and should not be treated. A delayed harvest from 28 to 49 days after treatment (DAT) coincided with greater TRS values and 17% more sucrose yield.

Suggested Citation

  • Douglas J Spaunhorst & James R Todd & Anna L Hale, 2019. "Sugarcane cultivar response to glyphosate and trinexapac-ethyl ripeners in Louisiana," PLOS ONE, Public Library of Science, vol. 14(6), pages 1-10, June.
    • Handle: RePEc:plo:pone00:0218656
    DOI: 10.1371/journal.pone.0218656
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