FIGURE 2.
Mean B. lactucae conidia per lettuce (L. sativa) cv. Casino plant was lower in UV→UV plants than any other treatment combination (n = 11). Donor plants were treated with photosynthetically active radiation (PAR) + UV-B or PAR only (control) and then inoculated with 105 conidia mL– 1 of B. lactucae. At 7 days post-inoculation, recipient UV-B or control treated plants were placed in a misting tent with donor plants. At 11 days after being placed in the misting tent, recipient plants were washed and the resulting conidia suspension counted. Treatments are coded in the format of donor→ recipient treatment where C = control and UV = UV-B-pre-treated. Lower case letters indicate significance groups (ANOVA Tukey HSD; p < 0.05). Error bars indicate 1 SE.