Cucurbit Downy Mildew was reported throughout the southeast and in the mid-Atlantic states in June 2018. The majority of DM reports were on cucumbers with 12 instances in all counties reporting. Three instances of DM on squash were reported, 2 in melon fields, 4 in squash fields and 1 instance in a watermelon field.
June 29: First report from AL. New reports from GA and SC. CDM has been confirmed on cantaloupe, cucumber, and squash in a 1a home garden in Lee County, AL. Incidence is 100%, severity is 50%. Estimated date of first symptoms is June 15. CDM has been confirmed on watermelon in a 30 acre field in Turner County, GA. Incidence is 10%, severity is unknown. Estimated date of first symptoms is June 22. CDM has been observed on cucumber in a field in Darlington County, SC. Incidence and severity are unknown. Estimated date of first symptoms is June 22. CDM has been confirmed on butternut squash in the sentinel plot in Lexington County, SC. Incidence is 10%, severity is 25%. Estimated date of first symptoms is June 24.
June 27: New report from GA. CDM has been confirmed on watermelon in a 20 acre field in Cook County, GA. Incidence is 10%, severity is 35%. Estimated date of first symptoms is June 20.
June 17: New reports from NC. CDM has been confirmed on cucumber in a 30 acre field in Nash County, NC. Incidence is 1%, severity is 20%. Estimated date of first symptoms is June 15. CDM has been confirmed on cucumber in a 0.1 acre research plot in Johnston County, NC. Incidence is 1%, severity is 1%. Estimated date of first symptoms is June 15.
June 15: First report from MD. New reports from NC, SC, and GA. CDM has been confirmed on cucumber in a 30a field in Dorchester County, MD. Incidence is .01%, severity is .05%. Estimated date of first symptoms is June 13. CDM has been confirmed on cucumber in the sentinel plot in Edgecombe County, NC. Incidence is 5%, severity is 1%. Estimated date of first symptoms is June 13. CDM has been observed on cantaloupe in a field in Bamburg County, SC. Incidence is unknown, severity is 5%. Estimated date of first symptoms is June 8. CDM has been confirmed on cucumber in a 30 acre field in Decatur County, GA. Incidence is 40%, severity is 25%. Estimated date of first symptoms is June 7.
June 13: First reports from SC. New report from GA. CDM has been confirmed on cucumber in a field in Horry County, SC. Incidence is unknown, severity is unknown. Estimated date of first symptoms is June 6. CDM had been observed on butternut and summer squash in the sentinel plot in Charleston County, SC. Incidence is unknown, severity is unknown. Estimated date of first symptoms is May 31. CDM has been confirmed on cucumber in a 20 acre field in Thomas County, GA. Incidence is unknown, severity is 10%. Estimated date of first symptoms is June 5.
June 6: New report from NC. CDM has been confirmed on cucumber in a 40 acre field in Duplin County, NC. Incidence is 10%, severity is 10%. Estimated date of first symptoms is June 1.
June 4: New report from GA. CDM has been confirmed on cucumber in a 2 acre research plot in Tift County, GA. Incidence is unknown, severity is 10%. Estimated date of first symptoms is May 28.
June 1: New report from NC. CDM has been confirmed on cucumber in a 10 acre field in Wilson County, NC. Incidence is <1%, severity is 20%. Estimated date of first symptoms is May 27.
Visit The Cucurbit Downy Mildew Forecast Website for epidemic history and the current CDM forecast.
