October NY world sugar #11 (SBV25) on Monday closed down -0.21 (-1.36%), and December London ICE white sugar #5 (SWZ25) closed down -4.70 (-1.03%). Sugar prices sold off on Monday, with London sugar posting a new 4-year low.   Sugar prices have been sliding over the past six months, with NY sugar slumping to a 4.25-year nearest-futures low last Thursday on ramped-up sugar production in Brazil.  Last Wednesday, Unica reported that Brazil's Center-South sugar output in the second half of August rose by +18% ...