By Heather Walsh Bloomberg May 10, 2010 Colombian coffee growers said production surged 88 percent in April as the crop recovered from a slump last year. Output rose to 647,000 bags, the highest level since February, from 345,000 bags in the year-earlier period after weather improved, Colombia’s National Federation of Coffee Growers said today in an e-mail statement. “Colombian coffee production has started to recover lost ground,” the federation said. Colombia, the world’s second-largest supplier of mild- tasting Arabica beans after Brazil, will increase its crop by 6.1 percent in the first six months of the year, according to the federation’s forecast. Colombian output will climb in May and June, bringing production in the first six months to 4.50 million bags from 4.24 million bags in the same period the prior year. The federation reiterated its forecast made last month. A bag weighs 60 kilograms (132 pounds). Arabica coffee has slipped 2.8 percent in five sessions, t...