The cost of our morning orange juice has recently been soaring, and now we finally have an explanation for the price hikes that reveals a problem that has been bedeviling the juice industry for at least three years. Closing futures prices of benchmark frozen concentrate juice peaked at $4.87 a pound May 28 on the Intercontinental Exchange in New York, CNBC reported, nearly twice the price last year. That price had dropped to $4.09 by Tuesday, but still far higher than a year ago. The biggest cause of the jump are problems in the orange groves of Brazil, which account for 70 percent of the oran…