Cucumber downy mildew, caused by the oomycete pathogen Pseudoperonospora cubensis, has been found in a commercial cucumber field in Johnston County. The first report in North Carolina was made on June 8 of 2020 on a related post with management information.
Approximately 25% of the field was infected at 40% disease severity. The recent rains in the state create favorable conditions for the pathogen and we expect more fields to become infected as the weather continues to be wet and cool.
Cucumber field infected with downy mildew (Brandon Parker, NC State Extension).
