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Lanceleaf Sage (Salvia reflexa) Interference in Sugarbeet

  • Dennis C. Odero (a1), Abdel O. Mesbah (a1), Stephen D. Miller (a1) and Andrew R. Kniss (a1)
Abstract

Field studies were conducted in Powell, WY, in 2006 and 2007 to determine the influence of season-long interference of various lanceleaf sage densities and durations of interference on sugarbeet. The rectangular hyperbola model with the asymptote (A) constrained to 100% maximum yield loss characterized the relationship between lanceleaf sage density and sugarbeet yield loss. The estimated parameter I (yield loss per unit weed density as density approaches zero) was 3% for both root and sucrose yield loss. Increasing duration of lanceleaf sage interference had a negative effect on sugarbeet root yield. The critical timing of weed removal to avoid 5 and 10% root yield loss was 37 and 52 d after sugarbeet emergence, respectively. Lanceleaf sage interference did not affect percentage of sucrose content. These results indicate that lanceleaf sage is not as competitive as other weeds but that appropriate control measures should be undertaken to minimize sugarbeet yield loss from interference.

Se llevaron al cabo estudios de campo en 2006 y 2007 en Powell, WY. para determinar la influencia de la interferencia a lo largo de la temporada de varias densidades de Salvia reflexa y la duración de la interferencia en la remolacha azucarera (Beta vulgaris L.). El modelo de hipérbola rectangular con la asíntota(A) restringida al 100% máximo de pérdida de rendimiento caracterizó la relación entre la densidad de Salvia reflexa y la pérdida del rendimiento de la remolacha azucarera. El parámetro estimado I (pérdida del rendimiento por unidad de densidad de la maleza conforme la densidad se acerca a cero) fue 3% tanto para la pérdida de la raíz como la pérdida de la producción de sucrosa. El incremento en la duración de la interferencia de la Salvia reflexa tuvo un efecto negativo en el rendimiento de la raíz de Beta vulgaris L El tiempo crítico de remoción de maleza para evitar entre el 5 y 10% de pérdida del rendimiento de la raíz fue a los 37 y 52 días después de la emergencia de la remolacha azucarera, respectivamente. La interferencia de Salvia reflexa no afectó el porcentaje del contenido de sucrosa. Estos resultados indican que la Salvia reflexa no es tan competitiva como otras malezas, pero deben realizarse medidas de control apropiadas para minimizar la pérdida del rendimiento de la remolacha azucarera a partir de la interferencia.

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Corresponding author
Corresponding author's E-mail: odero@uwyo.edu.
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Weed Technology
  • ISSN: 0890-037X
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