DES MOINES, Iowa, Oct. 20 (TNSres) -- Iowa Workforce Development issued the following news release: Iowa's seasonally adjusted unemployment rate ticked up to 3.0 percent in September, up from 2.9 percent last month but down from 3.1 percent a year ago. Meanwhile, Iowa's labor force participation rate decreased slightly from 68.7 percent to 68.6 percent in September as college students left the workforce to return to school. The U.S. unemployment rate remained at 3.8 percent in September, and t  more