Powdery mildew
is a fungal disease that is caused by many different species of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula. Damage symptoms Powdery mildew [...] plant cells and barely survive in the absence of a living crop. They survive as ascospores or perithecia, structures containing ascospores. Ascospores have [...] stomata. Conidia are the main means of dispersal. They are dispersed by wind, as are the ascospores. In general, powdery mildew fungi are not very resistant