Powdery mildew
provide excess nitrogen since this promotes the disease Prevent plant diseases by optimizing plant potential and crop resilience. [...] apple, pear, outdoor grown rose and other Rosaceae , the fungus causing powdery mildew is extremely sensitive to water and ‘hides’ on the underside of the [...] mildew fungi and especially in greenhouse crops they don’t play a role in the epidemics. Fungal spores germinate on the leaf surface and the germ tubes