March 19 (Bloomberg) — Hershey Co., the largest chocolate maker in the U.S., was ordered to face a lawsuit by investors seeking to force it to turn over records about cocoa from African farms that may use illegal child labor.

A Louisiana pension fund raised legitimate questions about Hershey executives' knowledge of how much of the company's cocoa, grown in West Africa, may have been produced by child slaves, Delaware Chancery Court Judge Travis Laster said yesterday. He overruled a master's recommendation that the shareholders' request to see cocoa-supply chain records be denied.

West Africa, including top growers Ghana and Ivory Coast, accounts for about 70 percent of the world's cocoa-bean production. Pressure to manufacture chocolate without harming children may grow as global sales of sweets head toward a record in 2014 and candy makers process more beans, according to data by Euromonitor International Ltd.