IA Pest Alert: Tar spot observed in central IA on 6/22. According to Tarspotter, most of IA is at risk. Corn fields should be scouted. Leave the fungicide on the shelf until at least tassel. Links to resources below.

June 23, 2023

ICM Blog article: https://crops.extension.iastate.edu/blog/alison-robertson/tar-spot-observed-six-counties-central-iowa

Tar Spot of Corn Map: https://cropprotectionnetwork.org/maps/tar-spot-of-corn

Included photo:

This alert was sent to all subscribers of the Iowa Pest Alert Network.