Fig. 2.

Colonization of CMV-infected C. pepo plants in the field by A. gossypii. Means and standard errors are displayed for visual reference only and pertain to populations of A. gossypii that established naturally on plants in field plots. Analysis with the Kruskal-Wallis test indicates that samples from the two treatments differ in mean ranks for census two (H = 14.62, df = 1, P = 0.000) and census three (H = 4.04, df = 1, P = 0.044) (indicated by asterisks on graph). Inset shows the percent of plants that had been colonized by aphids by treatment and census date.