FIG. 5.

Effect of prior wounding on A. pullulans densities in the residual leaf habitat. Mean A. pullulans (Ap) densities for segments taken from successively sampled leaves (dotted lines), untreated whole leaves (♦), and naïve segments (□) are plotted versus time (sample day, where zero time was the day on which segment 1 samples were analyzed). The error bars indicate standard deviations. (a) Sampling performed on 5 to 12 July. Data were obtained by analysis of 12 whole leaves on each date and of segments taken in succession from 12 additional leaves; data were obtained from 11 of the 12 repeatedly sampled leaves on sample day 3 (segment 2) and from 10 of the 12 repeatedly sampled leaves on sample day 7 (segment 4). (b) Sampling conducted on 24 to 31 July. The results on each date were obtained by analysis of 15 whole leaves, naïve segments excised from 15 previously untreated leaves (14 leaves on day 2), and segments taken in succession from 15 additional leaves (14 leaves on day 2).