SE Michigan: Monroe, Washtenaw, Wayne and Lenawee counties regional report for August 4

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.

Weather, insects, and diseases

Humid weather has been in place over southeast Michigan for the past week. High temperatures have been in the upper 80s and lows have been in the mid-50s to upper 60s. Rainfall has been scattered with some locations receiving two or more inches and other places less than a quarter of an inch.

Corn earworm moth trap catches have increased over the past week. Western bean cutworms continue to be caught in low numbers, and European corn borer trap captures are increasing. Diamondback moth captures continue to be high. Black cutworm moths have been quite active and numerous on some farms. Fall armyworm moths are being captured. Squash bug numbers are building to large numbers in some pumpkin and squash plantings.
Powdery mildew and downy mildew are showing up in vine crops now.

Crop report

Sweet corn harvest is in full swing now in southeast Michigan and northern Ohio. Summer squash crops are very good, as are zucchini and cabbage. Tomatoes are being harvested now. Watermelons are also growing very well and are now being harvested in some places. Peppers are being harvested.

Powdery Mildew on Pumpkin
Photo 1. Powdery mildew on pumpkin.

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