Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu
There have been no new reports of downy mildew on the east coast since last Friday’s report of the discovery in North Carolina. The forecast for Thursday June 11 was for a moderate risk of transport into the Delmarva Peninsula. Growers and processors are encouraged to keep abreast of the progress of downy mildew by visiting the CDM ipmPIPE website http://cdm.ipmpipe.org. Forecasts are made every Monday, Wednesday and Friday. With the weather pattern favoring diseases this year, a cover spray of Bravo or mancozeb on cucumbers at this point should be considered. Once the disease gets closer or is found in DE then switching to a downy mildew specific fungicide such as Previcur Flex, Presidio, Ranman or Tanos is recommended.