Powdery mildew
( Erysiphe, Podosphaera, Oïdium, Leveillula ) are all biotrophic fungi, meaning they feed on living plant cells and barely survive in the absence of a living [...] conidiophores in this case also protrude from the stomata. Conidia are the main means of dispersal. They are dispersed by wind, as are the ascospores. In general