* The energy sector dropped 2.6% as U.S. crude prices were down 2.4% a barrel and Brent crude lost 1.9%. [O/R]
* Shares of Husky Energy fell 4.5% after the company posted a quarterly loss compared with a year-ago profit, while TC Energy dropped 1.5% after posting a 6% fall in second-quarter comparable profit.
* At 9:44 a.m. ET (1344 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 190.58 points, or 1.17%, at 16,104.08.
* Whitecap Resources Inc fell 5.2%, the most on the TSX, after the oil producer posted a wider-than-expected loss.
* The second biggest decliner was methanol producer Methanex Corp, down 4.6%.
* The materials sector, which includes precious and base metals miners and fertilizer companies, lost 1.2% as gold futures fell 0.3% to $1,947.1 an ounce. [GOL/]
* On the TSX, 30 issues were higher, while 191 issues declined for a 6.37-to-1 ratio to the downside, with 18.27 million shares traded.
* The largest percentage gainer on the TSX was Tourmaline Oil Corp , which jumped 4.8% after the oil producer posted a surprise profit.
* Its gains were followed by pot producer Aphria Inc , which rose 4.3%, after brokerage CIBC hiked its price target on the stock.
* The most heavily traded shares by volume were Eastmain Resources Inc , Kinross Gold Corp and Baytex Energy Corp .
* The TSX posted one new 52-week highs and no new low.
* Across all Canadian issues there were 17 new 52-week highs and two new lows, with total volume of 41.97 million shares.
(Reporting by Amal S in Bengaluru; Editing by Amy Caren Daniel)