Acatenango, a two-time German Horse of the Year and sire of such accomplished international runners as Lando and Borgia, has been pensioned from stud duty at Gestut Fahrhof because of fertility problems, according to the Australian Associated Press. The 22-year-old son of Surumu was Germany's leading sire in 1993, 1995, 1997, and 1999.Acatenango, who was produced from the Aggressor II mare Aggravate, has sired 56 stakes winners. Lando was a multiple champion in Germany and Italy and the first German-trained horse to win the Japan Cup (Jpn-I). He is now an established sire in Germany. Borgia, a champion in Germany, England, and France, ran second in the 1997 Breeders' Cup Turf (gr. IT).