SE Michigan: Monroe, Washtenaw, Wayne and Lenawee counties regional report for May 19

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

What a difference a week can make. We are certainly into some steamy weather this week in southeast Michigan. We received approximately 1.75 inches of rain last Friday and Saturday (June 19 and 20), and the daytime temperatures have ranged from 63 to 90°F. Most of the heat has arrived in the last four to five days.

Crop report

The warmer weather coupled with the substantial rainfall amounts have led to vigorous plant growth, especially for vine crops, in the past week. Cabbage harvesting is progressing, as is the harvest of yellow squash, zucchini, and pickles on one farm that used row tunnels. Tomatoes and peppers have begun to look much better in terms of growth. Potatoes are flowering in a numbers of fields.

I continue to observe European corn borer adults in grassy field margins of sweet corn fields, but trap captures were considerably lower over the past week compared to the previous week. Cucumber beetles are more numerous, as are Colorado potato beetle larvae in potato fields. I have not observed any downy mildew infections in cucurbits as of the June 24, but the potential for infections is certainly present.

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