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Cucurbit Downy Mildew Forecast and Epidemic History | ipmPIPE

July 31, 2018

Downy Mildew Epidemic Updates

  • 1 August: Lagrange County, IN on Cucumber; Suffolk, VA on Butternut squash.
  • 31 July: First reports from TN and MI; new reports from PA and NJ. CDM had been confirmed in Knox County, TN; Berrien County, MI; Lancaster County, PA; and Hunterdon County, NJ. on cucumber; Cumberland County, NJ: on jack-o-lantern type Pumpkin.
  • 29 July: First reports from KY; new report from AL. CDM had been confirmed in Pulaski and Breathitt Counties, KY; and Russell County, AL.
  • 27 July:  Pulaski County, KY on Cucumber; Breathitt County, KY on Cucumber.
  • 25 July:  Lehigh County, PA on Cucumber; Cumberland, NJ on Butternut squash; Haywood County, NC on Cucumber.
  • 20 July: Henderson County, NC on Cucumber; Emporia County, VA on Cucumber.
  • 18 July: Wicomico County, MD on Cantaloupe.
  • 16 July: Chatham County, NC on Cucumber.
  • 10 July: Johnston County, NC on Acorn squash, Yellow/Summer squash, Butternut squash, Cantaloupe, & Giant pumpkin.
  • 12 July: Edgecombe County, NC on Acorn squash, Yellow/Summer squash, Butternut squash, Cantaloupe, Giant pumpkin, & Watermelon.
  • 11 July: Mifflin County, PA on Cucumber.
  • 9 July: Warren County, NJ on Cucumber; Hyde County, NC on Butternut squash & Cucumber.
  • 8 July: Dinwiddie County, VA on Cucumber.
  • 7 July: Russell County, AL on Cucumber.
  • 5 July: Lexington County, SC on Cucumber & Giant pumpkin; Charleston County, SC on Cantaloupe.
  • 4 July: Johnston County, NC on Butternut squash.
  • 1 July: Bamberg County, SC on Watermelon.
  • 26 June: Escambia County, AL on Cucumber.
  • 6 June: Baldwin County, AL on Butternut squash & Cucumber.

Cucurbit Downy Mildew Forecast

Overview: HIGH Risk for cucurbits throughout the eastern United States. We are in a prolonged period of very favorable weather for epidemic spread. Transport events move north/NW Tuesday July 31, generally north/NE Wednesday August 1 and Thursday August 2. Susceptible plants in large regions of the eastern U.S. are going to experience multiple rounds of survivable spore transport and effective deposition.   Read More