TORONTO, Feb. 2 (Xinhua) -- Canada's main stock index slumped to a four-month low Friday as weakness in commodity prices fueled a decline in shares of the heavyweight natural resource sectors.

The Toronto Stock Exchange's benchmark Standard & Poor's/TSX Composite Index plunged 254.89 points, or 1.6 percent, to close the day at 15,606.03. All of the index's 10 main groups were down.

The Canadian dollar fell 1.08 cents to 0.80.48 U.S. dollar.

The energy group fell 2.5 percent. Suncor Energy declined 1.8 percent to 43.81 Canadian dollars and Canadian Natural Resources Ltd fell 1.4 percent to 41.88 Canadian dollars.

The financials group dropped 1.2 percent. Bank of Nova Scotia was down 0.9 percent to 80.01 Canadian dollars, and Canadian Imperial Bank of Commerce slipped 1.7 percent to 119 Canadian dollars.

The materials group, which includes precious and base metals miners and fertilizer companies, slipped 2.8 percent. Barrick Gold Corp slipped 3.7 percent to 17.04 Canadian dollars, and Goldcorp Inc dipped 2.9 percent to 17.02 Canadian dollars.

Aphria Inc. crumbled 10.4 percent to 13.87 Canadian dollars while Canopy Growth Corporation fell 11.4 percent to 24.42 Canadian dollars. Enditem