It is the causal pathogen for grey leaf spot in tomatoes and leaf blight in alliums and cotton, though a wide range of additional species can serve as hosts. Symptoms include white spots on leaves and stems that progress to sunken red or purple lesions and finally leaf necrosis.
The pathogen responsible for the development of grey leaf spot in tomatoes and leaf blight in alliums and cotton is a widespread agent, with many other species capable of serving as hosts. The disease manifests as white spots on leaves and stems that eventually turn into sunken red or purple lesions before leading to leaf necrosis.