(Updates prices, adds sector details) March 23 (Reuters) - Canada’s main stock index inched lower on Tuesday, as energy stocks dropped over 2% tracking weaker crude, while investors remained cautious ahead of Congressional testimony by U.S. Fed Chair Jerome Powell and Treasury Secretary Janet Yellen. * The energy sector dropped 2.4% as oil prices fell more than 4%, hit by concerns over new pandemic curbs and slow vaccine rollouts in Europe. * At 9:35 a.m. ET (13:35 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was down 15.75 points, or 0.08%, at 18,799.38. * Oil producers Crescent Point Energy Corp and Meg Energy Corp were the biggest decliners on the index, falling 4.2% and 4.3% respectively. * The financials sector slipped 0.1%, while industrials rose 0.2%. * The materials sector, which includes precious and base metals miners and fertilizer companies, lost 0.3%. * On the TSX, 94 issues advanced, while 129 issues declined in a 1.37-to-1 ratio favoring decliners, with 15.65 million shares traded. * The largest percentage gainers on the TSX were George Weston Limited, which jumped 2.7% after the company announced it would sell its food retail segment, Weston Foods, and focus on its retail and real estate businesses. * Its gains were followed by greenhouse grower Village Farms International, Inc., which rose 2.7%. * The most heavily traded shares by volume were Canadian Natural Resources Limited, Bombardier Inc, and Power Corporation of Canada. * The TSX posted one new 52-week high and no new low. * Across Canadian issues, there were 14 new 52-week highs and three new lows, with total volume of 31.21 million shares. (Reporting by Amal S in Bengaluru; Editing by Vinay Dwivedi)