Segregation in the United States and its effect on the image of America in Africa will be discussed by Ghanian diplomat and three Americans during the Eighth National Conference of the U. S. National Commission for UNESCO at Boston University this week.

The conference--on "Africa and the United States: Images and Realities"--will attract nearly 100 African leaders and an expected 1800 delegates in the 75 sessions on education, science, humanities, and communications.

The sessions will be closed to the public, but Boston University is sponsoring simultaneously a College Student Conference, which will discuss related topics The UNESCO conference will be held Sunday through Thursday.

Participating on the panel about segregation Wednesday will be Em Debrah, Counselor of the U.S. Embassy of Ghana; Harold Isaacs, research associate at MIT; Willard R. Johnson, member of the U. S National Commission; and Edward V. Roberts, an assistant director of the United States Information Agency in Africa.

The panel is one of five sessions under the general heading "African Values and Images."

Also on Wednesday will be a session on foundation programs in Africa with representatives of the Edward W. Hazen Foundation of New Haven, Conn.; the Carnegie Foundation, UNESCO, Ford Foundation, and Phelps Stokes Fund of New York.