Downy mildew scout report for the week of July 4, 2013

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

Downy mildew was confirmed today (July 4) in Elgin County. NFGA thanks Catarina Saude, U of G – Simcoe, for confirming the presence of downy mildew. No downy mildew was confirmed in Kent County this 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 1, 2013.

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

NO

0 of 5

Norfolk/Elgin

YES

1 of 5

7

2

More information on the recent detections can be found here: http://cdm.ipmpipe.org/. 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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