Corn drops after two sessions of gains. Corn was down 0.4 percent at $3.68-3/4 a bushel, having gained 0.2 percent in the previous session. Wheat fell 0.2 percent to $5.08-1/4 a bushel. U.S. farmers will try and harvest as much as possible this week before the rains hit the Midwest region again. Forecasts show weather turning wet in parts of the U.S. Midwest towards the end of this month.