Downy mildew of Cucurbits
around 15 o C and the closer the temperature is to this, the shorter the leaf wetness period that is required. Inside the plant, the pathogens produce [...] They cause lesions on the upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the underside of the leave fluffy growth [...] formed, structures in which zoospores are produced. However, in downy mildews, sporangia often germinate directly and the germ tubes infect the plants either