FIG. 2.

Interaction means of populations of Listeria monocytogenes in the presence of four different antagonists on Golden Delicious apple plugs stored at 25°C over 7 days. Table footnotes: 1 and 2, treatment means within columns with different letters (a, b) and time means within rows with different letters (y, z) are significantly different at the 0.05 level; 3, treatment mean not different from zero at P < 0.05. Treatments with at least one nonzero CFU value were analyzed as a one-factor general linear model with Listeria-time coded as treatment. To correct for variance heterogeneity the variance grouping technique was used. The result was statistically significant (F = 1,186,70, P < 0.0001, df = 13). As treatment was statistically significant, mean comparisons are given.