Up to half of Pakistan's garment manufacturing units could go bust before the end of the year as a result of the global economic downturn and the recession in the United States, a senior industry official claimed on Monday. A slump in orders for next spring and economic uncertainty meant the country's textile and garment producers were not benefiting from recent trade concessions by the European Union, Pakistan Readymade Garments Manufacturers and Exporters Association (PRGMEA) chairman, Khubaib Ahmad Khan, told  a news agency.