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Wild Buckwheat (Polygonum convolvulus) Interference in Sugarbeet

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

Field studies were conducted in Powell, WY in 2006 and 2007 to determine the influence of season-long interference of various wild buckwheat densities and duration of interference on sugarbeet. Percent sucrose content was not affected by wild buckwheat interference. Root and sucrose yield loss per hectare increased as wild buckwheat density increased. The estimated percent yield loss as wild buckwheat density approaches infinity was 64 and 61% for root and sucrose yield loss, respectively. The estimated percent yield loss per unit weed density at low weed densities was 6% for both root and sucrose yield loss. Greater durations of wild buckwheat interference had a negative effect on sugarbeet root yield. The critical timing of weed removal (CTWR) to avoid 5 and 10% root yield loss was 32 and 48 d after sugarbeet emergence (DAE), respectively. These results show that wild buckwheat is competitive with sugarbeet and should be managed appropriately to forestall any negative effects on sugarbeet root and sucrose yield.

Estudios de campo realizados en Powell, WY en los años 2006 y 2007 fueron dirigidos para determinar la influenza de larga estación de interferencia de varias densidades de polygonum convolvulus y la duración de interferencia en la remolacha azucarera. El contenido de sacarosa no fue afectado por la interferencia de polygonum convolvulus. La raíz y la pérdida de producción de sacarosa por hectárea se incrementaron tanto como la densidad de polygonum convolvulus se incrementó. El porcentaje estimado de pérdida en la producción mientras la densidad de la polygonum convolvulus se acercó al infinito, fue de un 64 y un 61%, para la raíz y la pérdida de la producción de sacarosa respectivamente. El porcentaje estimado de pérdida en la producción por unidad de densidad de baja maleza fue del 6% para ambos, raíz y la pérdida de producción de sacarosa. Un mayor intervalo de interferencia de la polygonum convolvulus tuvo un efecto negativo en la producción de la remolacha azucarera. El tiempo crítico de remoción de maleza (CTWR) para evitar el 5 y el 10% de pérdida en la producción de la remolacha azucarera fue de 32 y 48 días después de la emergencia de ésta. Estos resultados muestran que la polygonum convolvulus es competitiva con la remolacha azucarera y debe ser manejado apropiadamente para evitar cualquier efecto negativo en la raíz y en la producción de sacarosa.

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Weed Technology
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