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Cucurbit Downy Mildew ipmPIPE epidemic updates

August 12, 2019

The Cucurbit Downy mildew ipmPIPE forcasts the likelihood of a CDM outbreak and reports outbreaks of the disease.

  • August 10, 2019: New report from VA. CDM has been confirmed in Suffolk County, VA.
  • August 8, 2019: First report from RI. New reports from SC, PA, and MD. CDM has been confirmed on butternut squash in a field in Washington County, RI. Incidence is 80%, severity is 30%. Estimated date of first symptoms is August 4. CDM has been confirmed on cucumber in a 15 acre field in Aiken County, SC. Incidence is 50%, severity is 10%. Estimated date of first symptoms is July 30. CDM has been confirmed on jack-o-lantern pumpkin in a field in Newberry County, SC. Incidence is 10%, severity is 10%. Estimated date of first symptoms is August 2. CDM has been confirmed in multiple locations on cucumber and jack-o-lantern pumpkin in Chester County, PA, on cucumber in a home garden, incidence 80% / severity 60% / estimated date of first symptoms is August 6; on pumpkin in a field, Incidence is 60%, severity is 30%, Estimated date of first symptoms August 6; pumpkin in a field, Incidence is 30%, severity is 30%, Estimated date of first symptoms August 6; pumpkin in a field, Incidence is 25%, severity is 30%, Estimated date of first symptoms August 6. CDM has been confirmed on jack-o-lantern pumpkin in more locations in Lancaster County, PA. The pumpkin find is in a field.
  • August 6., 2019: CDM has been confirmed on jack-o-lantern pumpkin in a field in Cecil County, MD. Incidence is 30%, severity is 25%. Estimated date of first symptoms is August 5.
  • August 5, 2019: New report from NC. CDM has been confirmed on cucumber in a home garden in Yadkin County, NC. Incidence is 40%, severity is unknown. Estimated date of first symptoms is July 28.
  • August 3, 2019: First report from PA. New report from TN. CDM has been confirmed on pumpkin in a field in Lancaster County, PA. Incidence is unknown, severity is 40%. Estimated date of first symptoms is August 1. CDM has been confirmed on butternut squash and cucumber in the sentinel plot in Cumberland County, TN. Incidence is 50%, severity is 25%. Estimated date of first symptoms is July 26.
  • August 1, 2019: First report from TN. New reports from NC, NJ, and MD. CDM has been confirmed on cucumber in the sentinel plot in Knox County, TN. Incidence is 50%, severity is 50%. Estimated date of first symptoms is July 26. CDM has been confirmed on cucumber in the sentinel plot in Haywood County, NC. Incidence is 75%, severity is 30%. Estimated date of first symptoms is July 29. CDM has been confirmed on cucumber in a field in Henderson County, NC. Incidence is 20%, severity is 15%. Estimated date of first symptoms is July 20. CDM has been confirmed on cucumber in a field in Burke County, NC. Incidence is 100%, severity is 50%. Estimated date of first symptoms is July 22. CDM has been confirmed on butternut squash in a field in Hunterdon County, NJ. Incidence is 10%, severity is 2%. Estimated date of first symptoms is July 28. CDM has been confirmed on acorn squash and kabocha pumpkin in the sentinel plot in Hunterdon County, NJ. Incidence is 5%, severity is 2%. Estimated date of first symptoms is July 29. CDM has been confirmed on cucumber in the sentinel plot in Wicomico County, MD. Incidence is 0.01%, severity is 0.1%. Estimated date of first symptoms is July 29.
  • July 29, 2019: First report from MI. New report from NC. CDM has been confirmed on cucumber in a research plot in Berrien County, MI. Incidence and severity unknown. Estimated date of first symptoms is July 29. CDM has been observed on jack-o-lantern pumpkin in a field in Chowan County, NC. Incidence is 1%, severity is 1%. Estimated date of first symptoms is July 22.
  • July 27, 2019: New report from NC. CDM has been confirmed on cucumber in a research plot in Wayne County, NC. Incidence is 15%, severity is 5%. Estimated date of first symptoms is July 16.
  • July 25, 2019: New reports from SC, NC, and AL. CDM has been confirmed on cucumber in the sentinel plot in Lexington County, SC. Incidence is 50%, severity is 10%. Estimated date of first symptoms is July 19. CDM has been confirmed on cucumber in the sentinel plot in New Hanover County, NC. Incidence is 25%, severity is 5%. Estimated date of first symptoms is July 23. CDM has been confirmed on acorn and butternut squash and cucumber in the sentinel plot in Elmore County, AL. Incidence is 100%, severity is 80%. Estimated date of first symptoms is June 26.
  • July 20, 2019: New reports from SC and AL. CDM has been confirmed on cucumber in a 0.5a field in Horry County, SC. Incidence is 20%, severity is 10%. Estimated date of first symptoms is July 15. CDM has been confirmed on butternut squash and cucumber in the sentinel plot in Escambia County, AL. Incidence is 100%, severity is 27%. Estimated date of first symptoms is July 5.
  • July 18, 2019: New report from NJ. CDM has been confirmed on butternut squash in a field in Gloucester County, NJ. Incidence is 5%, severity is 5%. Estimated date of first symptoms is July 17.
  • July 16, 2019: First report from MA. CDM has been confirmed on cucumber in a field in Barnstable County, MA. Incidence is 90%, severity is 25%. Estimated date of first symptoms is July 3.

Cucurbit Downy mildew forecasts apply to disease development from airborn transport of spores.

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