Downy mildew on cucumber has been confirmed in 17 Michigan counties across all major production regions. Michigan State University’s (MSU) spore trapping project continues to confirm the presence of clade 2 of the downy mildew pathogen, indicating cucumbers and melons are likely to become significantly diseased during this year’s outbreak. Next week will be the last of the spore trapping for the season. Mary Hausbeck’s MSU vegetable pathology program has developed short fact sheets that are regularly updated to include the most effective and recommended fungicides that have been shown in years of field trials to be effective against these destructive pathogens.
