Aschochyta rabiei, A. phaseolorum, A. pisi, A. lentis, A. pinodes and Phoma medicaginis var. pinodella
Figure 1 – Ascochyta blight symptoms: elongate lesions on stems (top), and circular lesions on leaves (bottom right) and pods (bottom left).
Figure 2 – Circular arrangement of pycnidia (structures that produce infective spores) on both stem (left) and leaf (right).
Figure 3 – Effect of infection on seed size and quality. Seeds (top) harvested from pods (bottom) collected from a severely infested field—healthy (left) and infected (right).
- Infected seed, infested debris and volunteers from previous seasons
- Rainstorms and sprinkler irrigation
- Moderate temperatures with daily highs less than 25°C [77°F]
Courtesy of R.M. Harveson and S.G. Markell