NEW YORK (Reuters) - The largest dockworker strike in nearly fifty years has entered its third day at U.S. East Coast ports, threatening shortages of goods ranging from bananas to auto parts and causing a backlog of ships anchored outside major ports.

Major retailers are implementing back-up shipping plans to ensure goods arrive in time for the peak holiday season. According to bill of lading data from Import Yeti, a data firm, here are some of the top retailers that have been the highest users of East and Gulf Coast ports for importing products between January through August this year. Retailers whose products are bulky, like furniture, typically use more shipping containers.

Retailer Top East Coast ports used Products imported Total TEUs (Twenty- foot equivale nt units/co ntainers ) Ikea Supply AG Savannah, GA; Norfolk, Home furnishing products 13080 VA; New York; Newark area, NJ RTG Furniture Corp Savannah, GA; Charleston, Household upholstery 5924 SC; Miami, FL furniture, sofas, wooden furniture Adidas International Charleston, SC; New York/ Footwear, Adidas branded 5328 Ag Newark area, NJ; Nash custom art sport Savannah, GA shoes, Adidas branded eienadt custom art shoes, goal keeper gloves Walmart Inc Norfolk, VA; New Apparel ready garment, 4661 York/Newark Area, NJ; home textiles, mill Savannah, GA cotton recycled polyester, plush toys Goodyear Tire & New York/Newark Area, NJ; Tires 3187 Rubber Co Savannah, GA; Charleston, SC Raymours Furniture New York/Newark area, NJ,.