Cucurbit downy mildew confirmed in Ohio

Protective fungicides should be considered for cucumbers and melons in eastern Michigan.

Downy mildew was confirmed on cucumbers in Wayne County in north central Ohio today (June 14). Cucumber and melon growers in eastern Michigan are advised to begin a preventive spray program immediately. See the current spray recommendations.

Spore counts in Michigan remain relatively low through June 4 and there are no confirmed reports of downy mildew in Michigan. Although spore counts have been low and the weather dry, it has been our experience in past years that once downy mildew is detected in Ohio, the disease occurs in Michigan soon after.

Dr. Hausbeck’s work is funded in part by MSU‘s AgBioResearch.

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