Ottawa, Sept. 8 -- Canada has imposed retaliatory tariffs on about USD 20 billion worth of US goods, escalating a growing trade confrontation between the two longtime allies after negotiations between Ottawa and Washington collapsed.

The new Canadian duties, which took effect just after midnight on Tuesday, range from 15 per cent to 50 pc and target a wide range of American products, including milk, perfume, video game consoles, golf clubs, fishing rods, steel, aluminum, jackets and T-shirts.

US cheese, carpets and some household appliances, including stoves and air conditioners, face 25 pc tariffs, while forklifts and industrial molds are subject to 15 per cent duties.

The measures follow Washington's decision to impose 50 pc tariffs on...