A group of banana-producing nations threatened to block the WTO's long-delayed global trade pact if Europe and Latin America press ahead with proposals to shake up banana import tariffs, the minister representing the grouping has said. "We will block the (WTO) negotiations if our latest counter-proposal is not accepted," Cameroon's Trade Minister Luc Magloire Mbarga Atangana, spokesman for the African, Caribbean and Pacific (ACP) trade grouping, said.