Powdery mildew
ascospores or conidia, don’t need nutrients or water for germination. In general, the development rate of the epidemic is fastest at 18-25 °C. High relative [...] most crops, the white colonies later turn brown or grey. Severely affected leaves may turn yellow, curl up or drop off. Life cycle and appearance of Powdery [...] resistant to water so rain often limits the epidemics and spore dispersal by rain is negligible, since spores explode when in contact with water for no more