What is the common name for Pseudoperonospora cubensis?

Answer 1

Cucurbit downy mildew is the common name for Pseudoperonospora cubensis.

This mildew is a much dreaded fungal disease of members of the gourd family (Cucurbitaceae). It particularly shows up and spreads in environments of high humidity, regular rainfall events, and supplemental irrigation. It tends to be described as a water mold that mars the appearance of cucurbit leaves, which curl upward as they die.

The fungus launches no direct attack on other plant body parts. But flowers, fruits, roots and stems quickly may be affected by the lack of protection once foliage is absent. Specifically, the harvest tends to be reduced. What there is of a yield tends to be dominated by misshapen or sunscalded fruits.