WASHINGTON, March 17 (Xinhua) -- U.S. wholesale prices declined by 0.6 percent in February, larger than the economists\' expectation, the Labor Department reported Wednesday. The rise in the department\'s Producer Price Index (PPI), a measure of inflation at the wholesale level, followed a 1.4 percent gain in January. Economists had forecasted a 0.2 percent drop. Excluding the volatile food and energy sectors, core wholesale prices rose by 0.1 percent in February, matching the...