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Cucurbit Downy Mildew Epidemic History for 2017

July 24
New reports from NY, PA, MI, and NC. CDM has been confirmed on cucumber in a 2 acre field in Genessee County, NY. Incidence is 40%, severity is 65%. Estimated date of first symptoms is July 21. CDM has been confirmed on cucumber in a 0.5 acre field in Cumberland County, PA. Incidence is 100%, severity is 80%. Estimated date of first symptoms is July 17. CDM has been confirmed on cucumber in a 10 acre field in Franklin County, PA. Incidence is 5%, severity is 5%. Estimated date of first symptoms is July 17. CDM has been confirmed on cucumber in a 1 acre research plot and the sentinel plot in Centre County, PA. Incidence is <1% and severity is <1% in the sentinel plot; incidence is 1% and severity is <1% in the research plot. Estimated date of first symptoms is July 23 for both plots. CDM has been confirmed on cucumber in a 0.5 acre field in Clinton County, PA. Incidence is 100%, severity is 10%. Estimated date of first symptoms is July 21. CDM has been confirmed on cucumber in fields in Wayne and Muskegon County, MI. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 21 for both outbreaks. CDM has been confirmed on cucumber in a 2 acre field in Lincoln County, NC. Incidence is 10%, severity is 25%. Estimated date of first symptoms is July 15.

July 21
New reports from OH and MD. CDM has been confirmed on cucumber in a 30 acre field in Henry County, OH. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 7. CDM has been confirmed on cucumber in the sentinel plot in Wicomico County, MD. Incidence is 1%, severity is unknown. Estimated date of first symptoms is July 20.

July 19
New reports from NJ, PA, and NY. CDM has been confirmed on cucumber in the sentinel plot in Hunterdon County, NJ. Incidence is 0.5%, severity is 0.1%. Estimated date of first symptoms is July 16. CDM has been confirmed on cucumber in the sentinel plot in Lancaster County, PA. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 18. CDM has been confirmed on cucumber in a 700 sq ft field in Dutchess County, NY. Incidence is 30%, severity is 30%. Estimated date of first symptoms is July 14.

July 17
New reports from SC, PA, NY, MI, and OH. CDM has been confirmed on watermelon in a field in Chesterfield County, SC. Incidence and severity are unknown. Estimated date of first symptoms is July 10. CDM has been confirmed on cantaloupe and cucumber in a 3 acre field in Juaniata County, PA. Incidence is 50%, severity is 10%. Estimated date of first symptoms is July 1. CDM has been confirmed on cucumber in 2 fields in Niagara County, NY, one 0.5 acres and another 10 acres. Incidence and severity are 5% and 2% in the half-acre field; incidence and severity are 5% and 25% in the larger field. Estimated date of first symptoms is July 17 and 14, respectively. CDM has been confirmed on cucumber in a field in Wood County, OH. Incidence and severity are unknown. Estimated date of first symptoms is July 7.

July 14
New reports from MI, AL, and PA. CDM has been confirmed on cucumber in fields in Gratiot and Lenawee Counties, MI. Incidence and severity are unknown. Estimated date of first symptoms is July 12/13. CDM has been confirmed on cucumber in the sentinel plot in Pickens County, AL. Incidence is 100%, severity is 15%. Estimated date of first symptoms is July 3. CDM has been confirmed on cantaloupe in a 2 acre field in Northumberland County, PA. Incidence is 25%, severity is unknown. Estimated date of first symptoms is July 12. CDM has been confirmed on cucumber in a field in Bay County, MI. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 17.

July 12
New reports from NC, PA, and MS. CDM has been confirmed on cucumber in a 0.1 acre greenhouse in Nash County, NC. Incidence is 90%, severity is 5%. Estimated date of first symptoms is July 10. CDM has been confirmed on cucumber in a 1200 sq. ft. field in MIfflin County, PA. Incidence is 90%, severity is 20%. Estimated date of first symptoms is July 1. CDM has been confirmed on butternut squash in a 3 acre field in Blair County, PA. Incidence is 100%, severity is unknown. Estimated date of first symptoms is July 10. CDM has been confirmed on cucumber in a home garden in Hinds County, MS. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 9.

July 10
First reports from VA. New reports from OH, NC, and SC. CDM has been confirmed on cucumber in home gardens in Dinwiddie and Suffolk Counties, VA. Incidence is 50%, severity is 10%. Estimated date of first symptoms is July 2. CDM has been confirmed on cucumber in a 5 acre field in Huron County, OH. Incidence is <1%, severity is 15%. Estimated date of first symptoms is July 4. CDM has been confirmed on cucumber in a field in McDowell County, NC. Incidence is 10%, severity is unknown. Estimated date of first symptoms is June 30. CDM has been confirmed on giant pumpkin in the sentinel plot in Darlington County, SC. Incidence is 10%, severity is 5%. Estimated date of first symptoms is July 7.

July 7
First report from NY. New reports from AL, NJ, and NC. CDM has been confirmed on cucumber in a 5.3 acre field in Erie County, NY. Incidence is 0.5%, severity is 10%. Estimated date of first symptoms is July 6. CDM has been confirmed on cucumber in a 20 acre field in Houston County, AL. Incidence is 100%, severity is unknown. Estimated date of first symptoms is June 25. CDM has been confirmed on butternut squash in the sentinel plot in Macon County, AL. Incidence is 100%, severity is unknown. Estimated date of first symptoms is June 24. CDM has been confirmed on cucumber in a 1 acre research plot in Lee County, AL. Incidence is 20%, severity is 1%. Estimated date of first symptoms is July 2. CDM has been confirmed on cucumber in a 0.5 acre field in Warren County, NJ. Incidence is 1%, severity is 1%. Estimated date of first symptoms is July 6. CDM has been confirmed on cucumber in a field in Buncombe County, NC. Incidence is unknown, severity is unknown. Estimated date of first symptoms is July 5. CDM has been confirmed on watermelon in a 0.2 acre home garden in Carteret County, NC. Incidence is 100%, severity is 25%. Estimated date of first symptoms is June 27. The report from Allen County, KY, upon further examination, was determined not to be CDM and has been deleted.

July 5
New report from NJ, PA, NC. CDM has been confirmed on cucumber in a 20 acre field in Cumberland County, NJ. Incidence is 1%, severity is 1%. Estimated date of first symptoms is July 3. CDM has been confirmed on cantaloupe and cucumber in a 1 acre field in Columbia County, PA. Incidence is 30%, severity is 50%. Estimated date of first symptoms is June 28. CDM has been confirmed on watermelon in a field in Clarendon County, SC. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 29.

July 3
First reports from MS and PA. New report from NC. CDM has been confirmed on cucumber in the sentinel plot in Copiah County, MS. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 27. CDM has been confirmed on cucumber in a very small commercial field in Montour County, PA. Incidence is 1%, severity is unknown. Estimated date of first symptoms is June 30. CDM has been confirmed on cucumber in 0.1 acre home garden in Person County, NC. Incidence is 100%, severity is 50%. Estimated date of first symptoms is June 29.

June 30
First reports from NJ, OH, DE, and MI. New reports from NC, MD, and SC. CDM has been confirmed on cucumber in a 10 acre field in Salem County, NJ. Incidence is 10%, severity is 20%. Estimated date of first symptoms is June 28. CDM has been confirmed on cucumber in a field in Wayne County, OH. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 25. CDM has been confirmed on cucumber in a field in Sussex County, DE. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 28. CDM has been confirmed on cucumber in a field in Monroe County, MI. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 29. CDM has been confirmed on cucumber in a home garden in Beaufort County, NC. Incidence is 100%, severity is 10%. Estimated date of first symptoms is June 28. CDM has been confirmed on cucumber in a field in Caroline County, MD. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 28. CDM has been confirmed on cucumber in a 0.5 acre field in Spartanburg County, SC. Incidence is unknown, severity is 10%. Estimated date of first symptoms is June 16. CDM has been confirmed on acorn squash, cantaloupe, and cucumber in a 10 acre field in Chester County, SC. Incidence is unknown, severity is 21%. Estimated date of first symptoms is June 19.

June 28
First reports from ON and KY. CDM has been confirmed on cucumber and cantaloupe in a field in Essex County, ON. Incidence and severity are unknown. Estimated date of first symptoms is unknown. CDM has been confirmed on spaghetti squash in a field in Allen County, KY. Incidence is 20%, severity is 5%. Estimated date of first symptoms is June 26. *** The Allen County, KY report was later determined to be in error and has been removed.***

June 26
New report from NC. CDM has been confirmed on cucumber in the sentinel plot in Johnston County, NC. Incidence is 10%, severity is 1%. Estimated date of first symptoms is June 21.

June 23
First report from MD. New reports from GA, NC, and SC. CDM has been confirmed on cucumber in a field in Dorchester County, MD. Incidence is 0.1%, severity is 3%. Estimated date of first symptoms is June 19. CDM has been confirmed on watermelon in a 30 acre field in Ben Hill County, GA. Incidence is 10%, severity is 20%. Estimated date of first symptoms is June 20. CDM has been confirmed on watermelon in a 70 acre field in Turner County, GA. Incidence is 15%, severity is 30%. Estimated date of first symptoms is June 20. CDM has been confirmed on cantaloupe and cucumber in the sentinel plot in Edgecombe County, NC. Incidence is 5%, severity is 1%. Estimated date of first symptoms is June 18. CDM has been confirmed on cantaloupe and cucumber in a 10 acre field in Williamsburg County, SC. Incidence is 50%, severity is unknown. Estimated date of first symptoms is June 15.

June 21
First report from AL. CDM has been confirmed on both varieties of squash and watermelon in the sentinel plot in Baldwin County, AL. Incidence is 100%, severity is 25%. Estimated date of first symptoms is May 12.

June 19
New reports from NC. CDM has been confirmed on cucumber in a 1 acre research plot in Sampson County, NC. Incidence is 10%, severity is 10%. Estimated date of first symptoms is June 15. CDM has been confirmed on cucumber in a 10 acre field in Franklin County, NC. Incidence is 1%, severity is 50%. Estimated date of first symptoms is June 15.

June 16
New reports from GA. CDM has been confirmed on watermelon in a 300 acre field in Lee County, GA. Incidence is 10%, severity is 30%. Estimated date of first symptoms is June 13. CDM has been confirmed on watermelon in a 30 acre field in Decatur County, GA. Incidence is 15%, severity is 20%. Estimated date of first symptoms is June 13.

June 14
New reports from SC, NC, and TX. CDM has been confirmed on cucumber in the sentinel plot and a nearby research plot in Charleston County, SC. Incidence is 10%, severity is 10%, in the sentinel plot. Estimated date of first symptoms is June 9 for the research plot, June 13 in the sentinel plot. CDM has been confirmed on cucumber in a 4 acre field in Wilson County, NC. Incidence is 1%, severity is 2%. Estimated date of first symptoms is June 10. CDM has been confirmed on cantaloupe and cucumber in the sentinel plot in Lenoir County, NC. Incidence is 15%, severity is 3%. Estimated date of first symptoms is June 11. CDM has been confirmed on watermelon in a 300 acre field in Brazos County, TX. Incidence is .01%, severity is 5%. Estimated date of first symptoms is June 13.

June 7
First report from NC and SC. New reports from GA. CDM has been confirmed on cucumber in a 12 acre field in Duplin County, NC. Incidence is 5%, severity is 40%. Estimated date of first symptoms is June 5. CDM has been confirmed on cucumber in a 10 acre field in Horry County, SC. Incidence is 100%, severity is 50%. Estimated date of first symptoms is May 30. CDM has been confirmed on cucumber in a 5 acre research in Tift County, GA. Incidence is 35%, severity is 50%. Estimated date of first symptoms is June 4. CDM has been confirmed on watermelon in a 50 acre field in Tattnall County, GA. Incidence is 5%, severity is 30%. Estimated date of first symptoms is June 4.

May 15
First report from GA. CDM has been confirmed on cucumber in a 10 acre field in Echols County, GA. Incidence is 20%, severity is 30%. Estimated date of first symptoms is May 12.

May 10
New report from FL. CDM has been confirmed on cantaloupe, cucumber and watermelon in the sentinel plot in Hillsborough County, FL. Incidence is 90%, severity is 25%. Estimated date of first symptoms is May 5.

April 26
First report from TX. CDM has been confirmed on watermelon in a 60 acre field in Hidalgo County, TX. Incidence is <15%, severity is 20%. Estimated date of first symptoms is March 29.

March 25
New report from FL. CDM has been confirmed on cucumber and watermelon in a 20 acre commercial field in Manatee County, FL. Incidence and severity are 100% / 15% on the cucumber, 25% / 5% on the watermelon. Estimated date of first symptoms is March 17.

March 7
New report from FL. CDM has been confirmed on cucumber, acorn and butternut cialisfrance24.com squash, cantaloupe, giant pumpkin, and watermelon in the sentinel plot in Miami-Dade County, FL. Incidence and severity vary; incidence is highest in cucumber, Big Max pumpkin, and butternut squash. Severities are low. Estimated date of first symptoms is March 3.

February 17
First report from the U.S. (FL). CDM has been confirmed on cucumber in a greenhouse in Citrus County, FL. Incidence is 100%, severity is 40%. Estimated date of first symptoms is January 10.