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1 January 2010 Wild Buckwheat (Polygonum convolvulus) Interference in Sugarbeet
Dennis C. Odero, Abdel O. Mesbah, Stephen D. Miller, Andrew R. Kniss
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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.

Nomenclature: Wild buckwheat, Polygonum convolvulus L. POLCO; sugarbeet, Beta vulgaris L

Dennis C. Odero, Abdel O. Mesbah, Stephen D. Miller, and Andrew R. Kniss "Wild Buckwheat (Polygonum convolvulus) Interference in Sugarbeet," Weed Technology 24(1), 59-63, (1 January 2010).
Received: 11 June 2009; Accepted: 1 October 2009; Published: 1 January 2010

critical period of weed control
length of competition
rectangular hyperbolic model
timing of removal
weed density
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