In wet weather, the lesions may coalesce, resulting in premature leaf drop and defoliation. The tips of severely-diseased stems wilt, turn brown, and die. The crop looks blighted. Later in the season, lesions may form on the pods, infecting the seed. Seed may be infected before harvest or while the crop is in the swath.
Infected seed turns partly or entirely brownish-purple.
Severely-infected seed may be shrivelled. Tiny black spots may appear on the surface of infected seeds. Clusters of brown spots often form on the leaves, upper stems and pods. These brown fruiting bodies distinguish Ascochyta from Anthracnose. Economic Thresholds None available.