Downy mildew of Cucurbits
On the underside of the leave fluffy growth appears which is first white and later turns grey-brown. This is actually the sporulation of the pathogens extruding [...] germination free water is required. For most downy mildews, the optimum temperature is around 15 o C and the closer the temperature is to this, the shorter [...] Because there are more stomata on the underside of the leaf, this is where most fluffy symptoms are found. How to prevent Downey mildew Choose resistant cultivars