Corn futures rose to the highest in five weeks on concern that rain will delay the harvest in the U.S., the world’s largest producer. Soybeans touched a three-week high, and wheat gained. Rain in some areas of the Midwest will disrupt soybean and corn collection with some severe weather “unfavorable for the mature crops” before drier weather returns by the end of the week, DTN meteorologist Joel Burgio said in a report.