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Cucurbit Downy Mildew ipmPIPE July epidemic updates

July 13, 2019

The Cucurbit downy mildew forecast is provided by the North Carolina State University departments of Plant Pathology & Marine, Earth, and Atmospheric Sciences. The website provides a map of recent outbreaks and lists outbreaks. Outbreaks for June & July 2019 are listed.

  • July 11 – Cucurbit Downy Mildew has been confirmed in Accomack and Chesterfield Counties, Virginia.
  • July 8 – First report from NJ. CDM has been confirmed on cucumber in a a field in Salem County, NJ. Incidence is 1%, severity is 1%. Estimated date of first symptoms is July 3.
  • July 4 – New report from AL. CDM has been confirmed on butternut squash and cucumber in Chilton County, AL. Incidence is 50%, severity is 5%. Estimated date of first symptoms is June 25.
  • June 27 – First reports from MD, AL, and VA. New report from NC. CDM has been confirmed on cucumber in a field in Caroline County, MD. Incidence is 0.01%, severity is 3%. Estimated date of first symptoms is June 24. CDM has been confirmed on cucumber in Lee County, AL. Incidence is 100%, severity is 25%. Estimated date of first symptoms is June 12. CDM has been confirmed on cucumber in Macon County, AL. Incidence is 100%, severity is 28%. Estimated date of first symptoms is June 12. CDM has been confirmed on cucumber in Isle of Wight County, VA. Incidence is 60%, severity is 50%. Estimated date of first symptoms is June 20. CDM has been confirmed on cucumber in Johnston County, NC. Incidence is 7%, severity is 1%. Estimated date of first symptoms is June 24.
  • June 22 – New report from NC. CDM has been confirmed on cucumber in Edgecombe County, NC. Incidence is 5%, severity is 1%. Estimated date of first symptoms is June 17.
  • June 20 – New reports from GA and NC. CDM has been confirmed on watermelon in Seminole County, GA. Incidence is 5%, severity is 30%. Estimated date of first symptoms is June 16. CDM has been confirmed on cucumber in Duplin County, NC. Incidence is 30%, severity is 20%. Estimated date of first symptoms is June 14. CDM has been confirmed on cucumber in Franklin County, NC. Incidence is 15%, severity is 5%. Estimated date of first symptoms is June 15. CDM has been confirmed on cucumber in Sampson County, NC. Incidence is 20%, severity is 20%. Estimated date of first symptoms is June 14.

Cucurbit downy mildew forecasts are issued three times per week. Monday and Wednesday forecasts will cover transport events for the next two days. Those on Friday’s will cover the next three days. The Current Forecast can be viewed at the following link.

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