The US is imposing a 17% tariff on most tomatoes imported from Mexico with immediate effect, the government said. The duty came into force after the US withdrew from a long-standing agreement with its southern neighbour,

The Trump administration announced on Monday a duty of about 17% on fresh tomatoes from Mexico, which account for two-thirds of the tomatoes eaten in the U.S., and the end of an export deal between the two countries.

Mexico currently supplies around 70% of the U.S. tomato market, up from 30% two decades ago, according to the Florida Tomato Exchange.