Sugar futures rose sharply after Cuba told customers it could not fulfill its shipment contracts.
Sugar futures rose in London last week, reversing a recent decline on supply fears.
Sugar futures settled sharply higher in reaction to reports of extensive hurricane damage to the Louisiana sugar crop.
Sugar futures have been extremely strong, and on Monday they were at their highest levels in six and a half years.
Sugar futures rose 0.37 cent to 0.54 cent, with October at 13.95 cents a pound.
Sugar futures settled 0.34 cent to 0.63 cent lower, with the contract for delivery in May at 11.63 cents a pound.
Sugar futures finished 0.27 cent to 0.38 cent lower, with March at 14.56 cents a pound.
Sugar futures generally have been sinking since early May, following forecasts by private trade houses for shrinking consumption and rising production.
Sugar futures finished 0.32 cent to 1.14 cents lower, with January at 12.76 cents a pound.
Sugar futures settled 0.31 cent to 0.43 cent higher, with March at 15.16 cents a pound.