Pakistan, Asia\'s third-largest wheat grower, may export as much as 4 million tonnes this year, double a target set by the government, as production exceeds local demand, a farmers\' group said. \"If the weather remains good, our exports will flourish,\" Ebrahim Mughal, chairman of Agri Forum Pakistan, a farmers\' welfare group, said in a phone interview yesterday. Exporters have shipped 1.1 million tonnes of wheat since the government lifted a three-year ban in December, he said. Exports from Pakistan may cool a 67 per cent rally in wheat prices in the past year, fuelling global food costs that the United Nations estimates advanced to a record in February. Wheat rallied after drought slashed harvests in Russia while floods eroded supplies from Canada and Australia.