For the second time this week a musician's union interfered with a student production when a New York local yesterday forced the cancellation of an intercollegiate Orchestra's concert in which several undergraduates were scheduled to participate.

As accompaniment to author, and commentator Oscar Levant in a special arrangement of Gershwin's "Rhapsody in Blue" student members of the orchestra from Harvard and nearby colleges planned to give a benefit for crippled children on April 24.

In a letter yesterday R. L. Harlow, vice-president of the Yankee Network, stated that "the union has refused permission for the use of the Intercollegiate Orchestra as an accompaniment for Oscar Levant, who happens to be a member of the New York Union."