May 3 (Reuters) - Canada’s main stock index opened higher on Monday as gold prices rose and data showed Canadian manufacturing activity grew for the 10th straight month in April. * At 9:32 a.m. ET (1332 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 114.3 points, or 0.6%, at 19,222.63. (Reporting by Devik Jain in Bengaluru; Editing by Shinjini Ganguli) Our Standards: The Thomson Reuters Trust Principles.