COCOA
March New York cocoa was down $13, or 0.6 percent, at $2,175 a tonne by 1456 GMT, having peaked earlier at $2,198, the highest for the second position since late January.
Dealers said the rise in prices this week had been driven partly by concerns about crop problems in top grower Ivory Coast that could lead to a significant fall in production in the 2017/18 season (October/September).
Cocoa output in Ivory Coast is expected to fall by nearly 12 percent by the end of the year for the current growing season because of diseases, exporters said this week.
"Excessive rainfall is to blame, as it has caused the spread of crop diseases like black pod and brown rot. There is no sign of any improvement in the next quarter," Commerzbank said in a market note.
"There are therefore rumours on the market that the current crop year 2017/18 could well see a global supply deficit."
December London cocoa was down 2 pounds, or 0.1 percent, at 1,627 pounds a tonne.
SUGAR
March raw sugar was up 0.04 cents, or 0.3 percent, at 14.88 cents per lb, the highest price for the front month since early August.
Dealers said the market was supported by rising crude oil prices, which could reinforce a shift in Brazil towards using more cane to produce ethanol rather than sugar.
They were also awaiting the release in the next few days of cane crush data for the Centre-South of Brazil covering the second half of October.
A survey of analysts by S&P Global Platts saw a CS Brazil cane crush of 29.68 million tonnes, down 8.4 percent from the prior two weeks.
"This drop in sugarcane crushing is due to the fact that mills are winding down their activity as we are approaching the season's end, while rains have disturbed crushing and 3.3 days are estimated as lost to rain," said Claudiu Covrig, senior sugar analyst at S&P Global Platts.
March white sugar rose by $1.50, or 0.4 percent, to $389.60 a tonne.
COFFEE
January robusta coffee was up $22, or 1.2 percent, at $1,832 a tonne, pulling away from Wednesday's 14-month low of $1,799.
Dealers said the market's failure to breach support around $1,800 had triggered short-covering. The second month rebounded from a low of $1,800 on Tuesday and $1,799 on Wednesday.
December arabica coffee rose by 1.60 cents, or 1.3 percent, to $1.2735 per lb.