Australia

Powdery mildew of Peas

Erysiphe pisi (Alphitomorpha pisi, Ischnochaeta pisi)

The first symptom is powdery white mycelium and spores on leaf and stem surfaces. On some cultivars, affected areas may die. All cultivars are dwarfed if infested early. Affected pods of some cultivars, including Oregon Sugar Pod, develop small brown to black necrotic spots.