According to Official Guinness Records,
The largest bunch of bananas, containing 473 individual bananas, was grown by Kabana SA and Tecorone SL (Spain) on the island of El Hierro, Canary Islands, Spain and weighed 130 kg (287 lb) on 11 July 2001. It was harvested at the jointly owned Finca Experimental de las Calmas, a projected 160-ha (395.3-acre) farm with 5 ha (12.3 acre) already devoted to bananas and is the result of a 30-year project by several farmers to develop a desert area of the island into a tropical fruit farm.
For a complete list of 2001 records, please visit 2001 Guinness Records in Spain.