Downy mildew scout report for the week of July 29, 2013

Cheryl Trueman, Vegetable Pest Management Researcher, Ridgetown Campus – University of Guelph

Downy mildew has been confirmed in the Elgin/Norfolk region and Kent County.

Please note that this was the final week for scouting in the Elgin/Norfolk region. Scouting in Kent County will conclude next week.

Table 1. Summary of downy mildew symptoms found in processing cucumber fields in Norfolk County, Elgin County, and Kent County, Ontario, week of July 29, 2013.

County DM Confirmed? # Affected Sites Avg. % canopy infected at affected sites Avg. # lesions per infected leaf
Kent

YES

4 of 4*

33

9

Norfolk/Elgin

YES

4 of 5

14

7

*Only 4 fields were scouted because one field was completely harvested.

About the Downy Mildew Scouting Program

The downy mildew scouting program is sponsored by the Ontario Cucumber Research Committee. Field scouting in Norfolk County is managed by Tania Keirsebilck-Martin at the Norfolk Fruit Growers’ Association. Field scouting in Kent County is managed by Cheryl Trueman at the Ridgetown Campus, University of Guelph. We thank Elaine Roddy, OMAFRA vegetable specialist, for her guidance with implementing this program

If you have specific questions about the scouting program in Kent County, please contact Cheryl Trueman (519-674-1500 x63646 / ctrueman@uoguelph.ca).

If you have specific questions about the scouting program in Norfolk County, please contact Tania Keirsebilck-Martin (519-426-0640 / tmartin@nfga.ca).

Information on downy mildew management in Ontario can be found here: http://www.omafra.gov.on.ca/english/crops/hort/2012-downy-cucumbers.htm.

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