Southern blight
lesions on the stem. As the damage progresses, it causes darkening and rotting of the stem, resulting in the destruction of the cortex and the main root [...] darkening and rotting of the stem, resulting in the destruction of the cortex and the main root. As a consequence, leaves higher up in the plant start yellowing [...] due to the occurrence of fungi inhabiting the soil, or associated with the seeds. In favourable conditions, these fungi cause necrosis of the young tissues