Figure 4.

Fusarium head blight (FHB) incidence and severity (%) in (a,c) Marco Aurelio and (b,d) DBC480 from 3 to 21 days post inoculation (dpi) and (e) FHB symptoms at 21 dpi for plants treated 48 h before the F. graminearum inoculation at the spike level with chitosan at 0.5%, tebuconazole at 0.06%, azoxystrobin at 0.08%, the mixture of tebuconazole at 0.06%, and azoxystrobin at 0.08%. Merely F. graminearum inoculated and mock plants were used as controls. The data represent averages and standard errors from three independent replicates with at least 10 spikes for each experimental group (wheat genotype × compound). Different letters (a, b, c) into the subfigures refer to the statistical analysis performed using one-way analysis of variance (ANOVA) with the Tukey test at a confidence level of 0.99 and p < 0.01.