Effect of Different Weed Competition Periods on Yield and Quality of Sugarcane

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Hassan, O.E.
El Amin, S.E
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Faculty of Agriculture, University of Khartoum, Shambat, Sudan
A field experiment was conducted for two consecutive seasons (1994/95 and 1995/96) at the research farm of Kenana Sugar Company to study the damage inflicted by weeds on sugarcane yield and quality. Losses in yield due to the presence of weeds were estimated at 58.1%. Six months after planting, weed competition reduced crop stand (stalk population) by 67.7% and lowered the stalk height by 21.4% at harvest. Stalk thickness was insensitive to competition. Weed competition during the first 45 days did not affect the final yield, but its continuation beyond this period drastically reduced yield components, and the magnitude of the reduction was a function of the duration of competition. Tillering was mostly affected by weed competition, while the effect on juice quality was insignificant.
Page(s): 6 (2), 40-48,10 Ref