June 1 (Reuters) - Canada’s main stock index rose at open on Tuesday, aided by gains in energy stocks tracking a rise in crude oil prices and data on strong growth in the Canadian economy during the first quarter. * At 09:31 a.m. ET (1331 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 206.85 points, or 1.05%, at 19,937.84. Reporting by Shivani Kumaresan in Bengaluru; Editing by Maju Samuel Our Standards: The Thomson Reuters Trust Principles.