First 2017 Report of Cucumber Downy Mildew in Ohio

July 3, 2017
Picture of downy mildew on cucumber plant leaf

June 28, 2017 - Downy mildew was confirmed this afternoon in cucumbers in West Salem (Wayne County), OH.  This follows a report of downy mildew on pickling cucumbers and cantaloupe in Essex County, Ontario yesterday, and is about 8 days earlier than our first Ohio report in 2016. Cucumber and melon growers throughout Ohio should intensify scouting, and these crops should be protected with effective fungicides. Cooler, wetter conditions the last week have been very favorable for downy mildew.

For more information, visit OSU Extension VegNet Newsletter.

Written by Sally Miller, Plant Pathologist, Department of Plant Pathology, College of Food, Agricultural, and Environmental Sciences.