The North Carolina Growers Association, which represents 1,000 farmers, signed a union contract yesterday covering 8,500 guest workers from Mexico - a move that the association and union said was the first union contract in the nation for guest workers...[T]he Mount Olive Pickle Company...signed a separate contract with the union, the Farm Labor Organizing Committee, ending a five-and-a-half-year boycott campaign against the company...In organizing a boycott...the union said that workers employed by Mount Olive's growers often lived in squalid housing and that one worker had died of heat prostration and another of heat prostration or exposure to pesticides...[Bill] Bryan [Mt. Olive's president]...asserted that the boycott was based partly on inaccurate information and unfair accusations.