Concerned about declining black enrollment, the University of Michigan is redoubling its efforts to increase applications from blacks in areas like Detroit. It is also developing targeted campaigns to reach out to high school counselors and families of minorities. Wayne State University and Michigan State University are noted as competitors in these areas. The number of black freshman enrolling at the University of Michigan-Ann Arbor fell 114.6 percent this year. Black enrollment this year is at its lowest level in at least six years, numbering 350 students - down from 410 last year.