Deere & Co. was sued by U.S. antitrust officials seeking to block its purchase of Monsanto Co.’s Precision Planting LLC equipment business, a deal the government says would eliminate competition and raise costs for farmers, Bloomberg News reported. Deere called the move “misguided” and said it plans to appeal. Deere’s acquisition would combine the only two significant U.S. providers of high-speed precision planting systems and would mean it would control close to 90 percent of the U.S. market, the Justice Department said today in a complaint filed in federal court in Chicago. “If this deal were allowed to proceed, Deere would dominate the market for high-speed precision planting systems and be able to raise prices and slow innovation at the expense of American farmers who rely on these systems,” said Renata Hesse, the head of the antitrust division. Deere, the world’s largest maker of agricultural machinery, agreed to buy the Monsanto unit in November for $190 million, according to the complaint.