Corn prices also rose, bolstered by strength in the wheat market and wet weather in the U.S. Delta. Excess rainfall along the southeastern portion of the Mississippi River has delayed spring planting there, potentially reducing the number of acres farmers will be able to sow with the grain and denting production this year. May corn lifted 4 3/4 cents, or 1.2%, to $3.86 1/2 a bushel.