The Duke streak is the longest in the country and the Blue Devils easily extended it by shooting 51 percent from the field.
Plumlee scored 19 points and grabbed 14 rebounds. Seth Curry added 15 points and Tyler Thornton had 13.
The Panthers were paced by Devonta White's 19 points. Freshman R.J. Hunter, son of Georgia State coach Ron Hunter, had 14 points and 10 rebounds.
Duke hopes to improve this year on a disappointing showing in the NCAA Tournament last season, where the Blue Devils were shocked in the opening round by Lehigh.