Mike Greco, who was known to connoisseurs of Italian cuisine as “the Salami King” and “the Mayor of Arthur Avenue,” and whose salumeria has catered to old neighbors, visiting politicians and insatiable Bronx expatriates for more than six decades, died on March 20 in White Plains. He was 89.

His death was confirmed by his son David. Mr. Greco, who lived in Yonkers, died in a rehabilitation center at White Plains Hospital.

A Calabrian immigrant, Mr. Greco arrived in New York in 1947 with his 17-year-old twin brother, Joe, each sporting a new suit and carrying $50. Mike went to work in a Bronx butcher shop, married the boss’s daughter and, in the early 1950s, opened a delicatessen nearby in the Arthur Avenue Retail Market, a building housing an array of merchants. His brother became the chef and owner of Joe Nina’s restaurant in the borough’s Pelham Bay section.

Mr. Greco started work at 6 a.m. seven days a week and made Mike’s Deli a place of pilgrimage in the heart of the Bronx’s Little Italy, roughly bounded in the Belmont section by Fordham Road on the north, East 181st Street on the south, Third Avenue on the west and the Bronx Zoo on the east. (The neighborhood’s most famous alumnus is probably Dion DiMucci, whose group, Dion and the Belmonts, plaintively sang in 1959, “Why must I be a teenager in love?”)