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2011 CDM Epidemic History

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Cucurbit Downy Mildew Epidemic History for 2011

October 28
No new reports or updates.

October 26
New report from TN. CDM has been discovered in a home garden in Davidson County, TN on butternut squash. Symptoms likely first appeared on October 19.

October 24
No new reports or updates. 

October 21
No new reports or updates.

October 19
The growing season has ended for the northern areas, plus a few others. Host presence is greatly diminished or gone and increasingly cool temperatures have helped squelch almost all disease activity. Counties in the following states / provinces have been changed to No Longer Found on the Epidemic Status map: WI, IN, MI, OH, southern Ontario,NY, PA, MA, DE, KY, and TN.

October 17
No new reports or updates.

October 14
New report from FL; update from SC and NC. CDM has been confirmed on cucumber in a 1 acre research plot in Gadsden County, FL. Incidence is 100%, severity is 25%. Estimated date of first symptoms is October 1. CDM has moved to giant pumpkin in the sentinel plot in Charleston County, SC. CDM has been confirmed on acorn squash in the Rowan County, NC sentinel plot. CDM has been confirmed on acorn squash, cantaloupe, and watermelon in the Rowan County sentinel plot.

October 12
Update from NC. CDM has been discovered on jack-o-lantern pumpkin in the sentinel plot in Rowan County, NC.

October 10
No new reports or updates. 

October 7
No new reports or updates. 

October 5
No new reports or updates. 

October 3
First report from WV. Update from SC. CDM has been confirmed on cucumber in a 0.5 acre commercial field in Lewis County, WV. Incidence is 10%, severity is 25%. Estimated date of first symptoms is September 25. CDM has moved to acorn squash and cantaloupe in the sentinel plot in Charleston County, SC.  

September 28
Updates from GA, SC, NC, and FL. CDM has been confirmed on cucumber in a research plot in Tift County, GA. Incidence is 20%, severity is 10%. Estimated date of first symptoms is September 13. CDM has been discovered on butternut squash and cucumber in the sentinel plot in Charleston County, SC. CDM has been discovered on new hosts in the sentinel plots in several NC counties: Rowan (butternut squash and cucumber), Henderson (acorn / summer squash), and Lenoir (butternut squash, cantaloupe, cucumber, and giant pumpkin). CDM has been confirmed on cantaloupe and cucumber in a 3 acre research plot in Collier County, FL. Incidence is 5%, severity is 1%. Estimated date of first symptoms is September 28.

September 26
No new reports or updates.

September 23
New report from MD. Updates from NC. CDM has been confirmed on jack-o-lantern pumpkin in a research plot in Washington County, MD. Incidence is 50%, severity 15%. Estimated date of first symptoms is September 22. NC: CDM has been discovered on cucumber in a research plot in Lenoir County ... on butternut squash and jack-o-lantern pumpkin in the sentinel plot in Haywood County ... on butternut squash, giant pumpkin, and cucumber in the sentinel plot in Henderson County ... on butternut squash in the sentinel plot in Johnston County ... and on acorn/yellow and butternut squash in the sentinel plot in Sampson County.

September 21
Updates from VA and IN. CDM has been confirmed on jack-o-lantern pumpkin in a research plot in Accomack County, VA. Incidence is 100%, severity is 25%. Estimated date of first symptoms is September 13. CDM has been confirmed on cucumber in a 15-acre commercial field in LaPorte County, IN. Incidence is 5%, severity 2%. Estimated date of first symptoms is August 30.

September 19
Update from NYCDM has appeared on butternut squash in the sentinel plot in Suffolk County. Estimated date of first symptoms is September 16. 

September 16
New report from CA. Update from NC. CDM has been confirmed on cucumber in the sentinel plot in Solano County, CA. Incidence is 25%, severity 10%. Estimated date of first symptoms is September 13. NC: CDM has moved to cucumber in the Haywood County sentinel plot, to cantaloupe in the Johnston County sentinel plot, and has appeared on cucumber and cantaloupe in the New Hanover County sentinel plot. 

September 14
Update from Maryland. Wicomico County: CDM has been confirmed on jack-o-lantern pumpkin in a 1 acre research plot. Incidence is 100%, severity 1%. Estimated date of first symptoms is September 12.

September 12
No new reports or updates. 

September 9
Update from NC. Sampson County: CDM has been discovered on cucumber in 2 separate research plots, and has moved to cantaloupe in the sentinel plot. Johnston County: CDM has moved to cantaloupe in the sentinel plot, and has been confirmed on cucumber in a research plot. 

September 7
New reports from CA. CDM has been confirmed on cucumber in a 12 acre commercial field in Santa Cruz County, CA. Incidence is 35%, severity is 10%. Estimated date of first symptoms is August 15. No new reports or updates. CDM has been confirmed on cucumber in a 20 acre commercial field in Monterey County, CA. Incidence is 10%, severity is 5%. Estimated date of first symptoms is August 10. CDM has been confirmed on cucumber in a 50 acre commercial field in San Joaquin County, CA. Incidence is 5%, severity is 5%. Estimated date of first symptoms is August 6. No new reports or updates. 

September 5
No new reports or updates.

September 2
First report from LA. Updates from MD and NC. CDM has been confirmed on acorn-yellow/summer squash in a commercial field in Tangipahoa Parish, LA. Incidence is 5%, severity is 5%. Estimated date of first symptoms is August 18. CDM has moved to butternut squash in the sentinel plot in Wicomico County, MD. CDM is confirmed on cucumber in the sentinel plots in Johnston and Sampson Counties, NC.

August 31
Update from DE. CDM has been discovered on acorn squash in the sentinel plot in New Castle County, DE

August 29
New report from VA. Update from DE. CDM has been discovered in a 1 acre field of jack-o-lantern pumpkin in Pulaski County, VA. Incidence is 100%, severity 20%. Estimated date of first symptoms is August 22. CDM has been observed on butternut squash in the sentinel plot in Sussex County, DE. 

August 26
First reports from MA and CA. New reports from PA, MI, and NY. Updates from PA and DE. CDM has been confirmed on butternut squash in a 1 acre field in Bristol County, MA. Incidence is 90%, severity is 75%. Estimated date of first symptoms is August 15. CDM has been confirmed on cucumber in a 15 acre field in Glen County, CA. Incidence is 35%, severity is 35%. Estimated date of first symptoms is August 24. CDM has been confirmed on cucumber in several tiny fields (0.1 - 0.2 acre) in Luzerne and Lackawanna Counties, PA. Incidence / severity is 75% / 25% in the single Luzerne County field, 25% / 20% in the 2 Lackawanna County fields. Estimated date of first symptoms is August 10-11. CDM has been observed on cantaloupe and cucumber in the sentinel plot in Centre County, PA. First symptoms are estimated at August 15. CDM has been confirmed on cucumber in home gardens in Lapeer and Oakland Counties, MI. Incidence is 100% both locations, severity 50-60%. Estimated date of first symptoms is August 21 (Lapeer) and August 26 (Oakland). CDM has been confirmed on cucumber in very small (0.5 acre) fields in Washington and Columbia Counties, NY. Incidence / severity is 90%/60% in Washington County, 80%/40% in Columbia County. First symptoms estimated at August 22. CDM has been confirmed on jack-o-lantern pumpkin in a 15 acre field in Rensselaer County, NY. Incidence is 25%, severity is 10%. Estimated date of first symptoms is August 22. CDM has moved to butternut squash and giant pumpkin in the sentinel plot in Lancaster County, PA. CDM has moved to giant pumpkin in the sentinel plot in New Castle County, DE. 

August 24
No new reports or updates.

August 22
First report from TN. CDM has been confirmed on jack-o-lantern pumpkin in a 5 acre commercial field in Lincoln County, TN. Incidence is 100%, severity is 30%. Estimated date of first symptoms is August 16.

August 19
First reports from KY and IN. New reports from NY and MI. Updates from NY, MD, and OH. CDM has been confirmed on cucumber in the sentinel plot in Breathitt County, KY. Incidence is 30%, severity is 40%. Estimated date of first symptoms is August 12. CDM has been confirmed on cucumber in the sentinel plot in LaPorte County, IN. Incidence is 10%, severity is 5%. Estimated date of first symptoms is August 11. CDM has been confirmed on cucumber in a research plot in Ontario County, NY. Severity is <5%. Estimated date of first symptoms is August 18. CDM has been confirmed on cucumber in a research plot in Clinton County, MI, and in a commercial field in Muskegon County, MI. Estimated date of first symptoms is August 18 in both cases. CDM has appeared on cantaloupe in the sentinel plot in Suffolk County, NY. CDM has been confirmed on Lagenaria siceraria in the sentinel plot in Wicomico County, MD. CDM has appeared on giant pumpkin in the sentinel plot in Huron County, OH (first symptoms August 10) and on giant pumpkin and watermelon in the sentinel plot in Sandusky County, OH (first symptoms August 18).  

August 17
Updates from OH, DE. CDM has been confirmed on cantaloupe in a 1 acre field in Wayne County, OH. Incidence is 5%, severity is 10%. Estimated date of first symptoms is August 3. CDM has also been observed on bottle gourd in the sentinel plot in New Castle County, DE.

August 15
New reports from WI. Updates from MD, OH. CDM has been confirmed on cucumber in large commercial fields in Waupaca and Waushara Counties, WI. Waupaca: 70 acre field, 15% incidence, 15% severity, estimated first symptoms July 29. Waushara: 65 acre field, 15% incidence and severity, August 1. CDM has been observed on cantaloupe in the sentinel plots in Wicomico County, MD and Sandusky County, OH. Symptoms appeared around August 5 in MD, August 11 in OH.

August 12
New report from NY. Updates from NJ, DE. CDM has been confirmed on cucumber in a research plot in Tompkins County, NY. Incidence is 10%, severity is 5%. Estimated date of first symptoms is August 6. CDM has been confirmed on butternut squash, jack-o-lantern pumpkin, and mixed gourds in Hunterdon County, NJ. Symptoms in the 7 acre field show 5% incidence, 60% severity. Estimated date of first symptoms is August 8. CDM has move to cantaloupe in the sentinel plot in New Castle County, DE.

August 10
New reports from NJ, ON, NY, and MI. Update from ON. CDM has been confirmed on cucumber in the sentinel plot in Hunterdon  County, NJ. Incidence is 20%, severity is 10%. Estimated date of first symptoms is August 5. CDM has been confirmed on cantaloupe, pumpkin, and watermelon in the sentinel plot in Norfolk County, ON. Incidence is <10%. Estimated date of first symptoms is August 2. CDM has been confirmed on cucumber in commercial fields in Yates County, NY (0.25 acres, 5% incidence, 40% severity, first symptoms August 9) and Erie County, NY (5 acres, 90% incidence, 50% severity, first symptoms August 1). CDM has been reported on cucumber in Cass County (field) and Jackson County (garden), MI. Estimated first symptoms in both locations is August 9. Incidence and severity are unknown. CDM has been confirmed on acorn squash, watermelon, and cantaloupe in the sentinel plot in Chatham-Kent County, ON. First symptoms on cantaloupe estimated at August 2, the others at August 5. 

August 8
New report from MI. Update from WI. CDM has been confirmed on cucumber in a research plot in Berrien County, MI. Incidence and severity are unknown. Estimated date of first symptoms is August 8. CDM has moved to cantaloupe and watermelon in the sentinel plot in Dane County, WI.

August 5
New report from OH. Updates from DE, OH, and NC. CDM has been confirmed on cucumber in a 50 acre commercial field in Seneca County, OH. Incidence is 5%, severity is 1%. Estimated date of first symptoms is August 3. From NC ... CDM has been discovered on cucumber in research plots in Johnston and Sampson Counties. CDM has spread to other hosts in the sentinel plots in Rowan County (butternut squash), Haywood County (acorn squash, cantaloupe, giant pumpkin), and Henderson County (cantaloupe, giant pumpkin). CDM has spread to cucumber in the sentinel plot in Sussex County, DE. CDM has moved to cantaloupe in the sentinel plot in Huron County, OH. CDM has been confirmed on cantaloupe in the 3 acre field in Wayne County, OH. Incidence is 5%, severity is 1%. Estimated date of first symptoms is August 3.

August 3
First report from NY. New report from MI. CDM has been confirmed on cucumber in the sentinel plot in Suffolk County, NY. Incidence is 10%, severity is 1%. Estimated date of first symptoms is July 30. CDM has been confirmed on cucumber in a research plot in Saginaw County, MI. Estimated date of first symptoms is August 1.

August 1
New reports from OH. Updates from PA and NC. CDM has been confirmed on cucumber in a 50 acre commercial field in Wood County, OH. Incidence is 2%, severity is 5%. Estimated date of first symptoms is July 28. A similar confirmation on cucumber is in Sandusky County, OH with incidence at 20% and other parameters the same as Wood County. CDM has been confirmed on cucumber in the sentinel plot in Lancaster County, PA. incidence is 25%, severity is 30%, estimated date of first symptoms is July 27. CDM has been confirmed on jack-o-lantern pumpkin in a research plot in Haywood County, NC. Incidence is 10%, severity is 3%. Estimated date of first symptoms is July 29.

July 29
New reports from NC and DE . CDM has been confirmed on acorn and butternut squash and cucumber in the sentinel plot in Henderson County, NC. Incidence is 25%, severity is 3%. Estimated date of first symptoms is July 24. CDM has been observed in a 30 acre field of cucumber in Kent County, DE. Incidence is 10%, severity is 1%. Estimated date of first symptoms is July 11. CDM has been confirmed on squash in the sentinel plot in Haywood County, NC.  

July 27
Updates from OH and NC. CDM has been confirmed on cucumber in the sentinel plot in Huron County, OH, and on cucumber in the sentinel plot in Haywood County, NC.

July 25
New reports from MD, OH, MI, and WI. CDM has been confirmed on cucumber in the sentinel plot in Wicomico County, MD.  Incidence is 100%, severity is 1%. Estimated date of first symptoms is July 22. CDM has been confirmed on cucumber in a field in Geauga County, OH. Estimated date of first symptoms is July 12. CDM has been confirmed on cucumber in a field in St. Claire County, MI. Estimated date of first symptoms is July 22. CDM has been confirmed on cucumber and cantaloupe in the sentinel plot in Dane County, WI. Incidence is 100%; severity is 25%. Estimated date of first symptoms is July 20.

July 22
New reports from VA, OH, NJ, NC, and AL. CDM has been confirmed on cantaloupe in a 2 acre commercial field in Camden County, NJ. Incidence is 50%, severity is 20%. Estimated date of first symptoms is July 18. CDM has been confirmed on cucumber in a 5.1 acre field in Haywood County, NC. Incidence is 1%; severity is 1%. Estimated date of first symptoms is July 19. CDM has been confirmed on cucumber in the sentinel plot in Accomack County, VA. Incidence is 25%; severity is 5%. Estimated date of first symptoms is July 20. CDM has been confirmed on cucumber in the sentinel plot in New Hanover County, NC. Incidence is 15%; severity is 2%. Estimated date of first symptoms is July 17. CDM has been confirmed on cucumber in a 3 acre commercial field in Holmes County, OH. Incidence is 5%; severity is 2%. Estimated date of first symptoms is July 22. CDM has been confirmed on cucumber and butternut squash in the sentinel plot in Macon County, AL. Incidence is 100%; severity is 15%. Estimated date of first symptoms is July 13.

July 20
New reports from PA, NC, and MD. CDM has been confirmed on cucumber in a commercial field in Lancaster County, PA. Severity is 5%. Estimated date of first symptoms is July 15. CDM has been confirmed on cucumber in a 2 acre field in Buncombe County, NC. Incidence is 1%; severity is 1%. Estimated date of first symptoms is July 17. CDM has been reported on acorn squash and cucumber in a home garden in Anne Arundel County, MD. Estimated date of first symptoms is July 14. CDM has also been confirmed on cucumber in a commercial field in Charles County, MD. Estimated date of first symptoms is July 19.  

July 18
First report from WI. New report from NC. CDM has been confirmed on cucumber in a research plot in Columbia County, WI. Incidence is 5%; severity is 10%. Estimated date of first symptoms is July 14. CDM has been confirmed on cucumber in a home garden in Randolph County, NC. Incidence is 100%; severity is very high. Estimated date of first symptoms is July 7.

July 15
First reports from AL. New report from MD. CDM has been confirmed on acorn squash, butternut squash, and cucumber in the sentinel plot in Baldwin County, AL. Incidence is 100%; severity is 10% (1% acorn). Estimated date of first symptoms is July 7. CDM has been confirmed on butternut squash and jack-o-lantern pumpkin in the sentinel plot in Escambia County, AL. Incidence is 100%, severity is 20%. Estimated date of first symptoms is July 1. CDM has been confirmed on cucumber in a commercial field in Caroline County, MD. Estimated date of first symptoms is July 4.

July 13
New reports from OH and NC. CDM has been confirmed on cucumber in a 9 acre commercial field in Huron County, OH. Incidence is 1%; severity is 1%. Estimated date of first symptoms is July 12. CDM has been confirmed on cucumber in the sentinel plot in Johnston County, NC. Incidence is 1%, severity is 0.01%. Estimated date of first symptoms is July 12. 

July 11
First report from VA. New report from MI. CDM has been confirmed on cucumber in a 1 acre commercial field in Prince George County, VA. Incidence is 100%; severity is 10%. Estimated date of first symptoms is July 5. CDM has been confirmed on cucumber in a home garden in Dinwiddie County, VA. Incidence is 100%, severity is 50%. Estimated date of first symptoms is July 5. CDM has been reported on cucumber in a commercial field in Bay County, MI. Severity is 5%. First-symptom date is July 11.

July 8
First reports from GA, OH, and MI. New report from DE. Update from NC. CDM has been confirmed on cucumber in a small research plot in Tift County, GA. Incidence is 10%; severity is 5%. Estimated date of first symptoms is July 3. CDM has been reported on cucumber in commercial fields in Wayne and Ashland Counties, OH. Wayne County outbreak is in a 1 acre field, 30% incidence, 10% severity. Estimated date of first symptoms is July 6. The Ashland County report is from a 2 acre field, incidence is 20%, severity is 10%, estimated first-symptom date is July 6. CDM has been confirmed on cucumber in a commercial field in Monroe County, MI. Estimated date of first symptoms is July 7. CDM has been confirmed on cucumber in the sentinel plot in New Castle County, DE. Incidence and severity are 1%. Estimated date of first symptoms is July 7. CDM has moved to cantaloupe in the sentinel plot in Sampson County, NC. First symptoms estimated at July 3. 

July 6
First reports from MD and DE. New reports from NC. CDM has been confirmed on cucumber in a commercial field in Talbot County, MD. Incidence is 1%; severity is 1%. Estimated date of first symptoms is July 4. CDM has been confirmed on cucumber in a field in Dorchester County, MD. Incidence is 0.5%, severity is 0.5%. Estimated date of first symptoms is July 4. CDM is confirmed on cucumber in a field in Kent County, DE. Incidence and severity are 0.5%. First symptoms estimated at July 4. CDM has been confirmed in a 20 acre field of cucumber in Duplin County, NC. Incidence is 40%, severity is 30%. Estimated date of first symptoms is June 30. CDM has been found on cucumber in the sentinel plot in Rowan County, NC. Incidence is 15%, severity is 2%. Estimated date of first symptoms is July 3.

July 5
First reports from Canada and PA. CDM has been confirmed on cucumber in a 10 acre commercial field in Chatham-Kent County, Ontario, Canada. Incidence is 1%, severity is 20%. Estimated date of first symptoms is June 30. CDM has been confirmed on cucumber in a 1 acre commercial field in Wyoming County, PA. Incidence is 10%, severity is 50%. Estimated date of first symptoms is June 30. The hot spot at one end of the field was destroyed by the grower. Update from NJ: CDM has been reported on cucumber in a research plot in Cumberland County, NJ. Incidence and severity are 5%. First symptoms estimated at July 4.

July 1
New reports from NC. CDM has been confirmed on cucumber in a 30 acre commercial field in Wilson County, NC. Incidence is 0.5%, severity is 0.5%. Estimated date of first symptoms is June 22. CDM is also confirmed on cantaloupe and cucumber in the sentinel plot in Lenoir County, NC. Incidence is 10%, severity is 1%. Estimated date of first symptoms is June 27.

June 29
First report from NJ. CDM has been reported on cucumber in a 2 acre commercial field in Cumberland County, NJ. Incidence is 10%, severity is 10%. Estimated date of first symptoms is June 29.

June 24
New report from NC. CDM has been reported on cucumber in a commercial field in Alamance County, NC. This is from a 500 sq. ft organic plot. Incidence is 50%, severity is 10%. Estimated date of first symptoms is June 15. Update: CDM has also been reported on cucumber in a small research plot, as well as the sentinel plot, in Sampson County, NC. Incidence is 25%, severity is 2% in the research plot; 2% and 1% in the sentinel plot. Estimated date of first symptoms is June 21 in both plots. 

June 20
First reports from NC. CDM has been reported on cucumber in commercial fields in Sampson and Hertford Counties, NC. The Hertford County report is from a 10 acre field. Incidence is <5%, severity is 30%. Estimated date of first symptoms is June 15. The Sampson County outbreak is in a 15 acre field. Incidence is 5%, severity is 50%. Estimated date of first symptoms is June 14.

June 15
Update from SC. CDM has been reported on acorn squash in a very small research plot in Charleston County, SC. Incidence is 17%, severity is 5%. Estimated date of first symptoms is June 8. 

June 10
Update from SC. CDM has been reported on butternut squash in the sentinel plot in Charleston County, SC. Incidence is 10%, severity is 5%. Estimated date of first symptoms is June 9.

May 27 - June 8
No new reports or recent updates.  

May 25
First report from TX. CDM has been reported on watermelon in a 25 acre commercial field in Hidalgo County, TX. Incidence is 10%; severity is unknown. Estimated date of first symptoms is May 23. 

May 2 - 23
No new reports or recent updates. 

April 29
No new reports or recent updates.

April 20
New Report from FL. CDM has been reported on acorn squash, yellow/summer squash, butternut squash, cucumber, and giant pumpkin in the sentinel plot in Hillsborough County, FL. Incidence and severity are as follows ... acorn squash 100% / 50%, cucumber 25% / 5%, butternut squash 100% / 50%, yellow crookneck squash 100% / 25%, pumpkin 50% / 10%. Estimated date of first symptoms is April 11 on the squash, April 15 for the others. 

April 15
Update from FL. CDM has been reported on watermelon in the sentinel plot in Miami-Dade County, FL. Incidence is 30%, severity is 1%. Estimated date of first symptoms is April 15.

April 11
First report from SC. CDM has been reported on yellow squash and zucchini at a retail location in Charleston County, SC. Incidence is 25%; severity is 7%. Both necrotic and fresh lesions were observed (April 6) and confirmed (April 10). Some plants were likely sold between the dates of first discovery and confirmation. Remaining plants at the retail location are being pulled. Estimated date of first symptoms is April 6.

April 6
New Report from the Caribbean. CDM has been reported on cucumber in a research plot near Lajas in Puerto Rico. Incidence is 100%; severity is 82%. Estimated date of first symptoms is February 14. 

March 30
Updates from FL. CDM has been reported on butternut squash, acorn squash, and cantaloupe in the sentinel plot in Miami-Dade County, FL. Incidence / severity is 100%/40% (butternut sq.), 20%/5% (cantaloupe), 10%/2% (acorn squash). Estimated date of first symptoms is March 25 for the butternut, March 29 for the other hosts. *** CDM has also been reported on cantaloupe in a research plot in Collier County, FL. Incidence is 75%, severity is 50%. Estimated date of first symptoms is March 18. 

March 25
Update from the Caribbean. CDM has been reported on cucumber in a research plot near Gurabo in Puerto Rico. Severity is 50%. Estimated date of first symptoms is March 15. 

March 18
Update from FL. CDM has been reported on cucumber in the sentinel plot in Miami-Dade County, FL. Incidence is 5%, severity is <1%. Estimated date of first symptoms is March 16. 

March 9
Update from FL (new host). CDM was confirmed in a research plot, on cucumber, in Miami-Dade County. Incidence is <1%, severity is 0.1%. Estimated date of first symptoms is March 7.

March 7
New report from FL. CDM has been confirmed on cucumber in a 0.5 acre research plot in Collier County, FL near the town of Immokalee. Incidence is 5%, severity is 5%. Estimated date of first symptoms is March 1.

March 2
No new reports or updates.

February 14
First report from U.S. in 2001 (FL). CDM has been confirmed on acorn squash and yellow/summer squash in a 40 acre commercial field in Miami-Dade County, FL. Incidence is 5-10%; severity is unknown at this time. Estimated first date of symptoms is February 9.