Crop Lookout Bulletins

Crop Lookout received reports of tar spot of corn and red crown rot of soybean this week.

Crop Lookout received reports of three foliar corn diseases across Iowa this week, including bacterial leaf streak, northern corn leaf blight, and gray leaf spot.

Tar spot of corn remained the most frequently reported disease in Crop Lookout this week, with new detections submitted from Indiana, Kansas, and Missouri.

Crop Lookout received two new reports of tar spot of corn this week, with detections confirmed in Illinois and Indiana.

Crop Lookout users reported tar spot of corn in Indiana and Missouri, along with a corn leafhopper sighting in Oklahoma.

Tar spot of corn was among the most frequently reported diseases in Crop Lookout this week, with new detections submitted from Indiana, Iowa, Kansas, and Nebraska. Nebraska accounted for the majority of reports, with confirmations spanning multiple counties across the state.

Newest reports highlight a broad range of crop health concerns across multiple regions and reinforce the importance of continued scouting as the growing season progresses.

Recent disease monitoring reports indicate continued spread of stripe rust across the central and upper Midwest as well as southern Canada.

Reports of stripe rust continue to emerge across the upper Midwest and southern Canada. In 2026, confirmed reports began as early as mid-May in a county in Wisconsin and in multiple counties across Canada.

Crop Protection Network will start releasing regular bulletin updates highlighting trends across our Crop Lookout tracking system. Check back soon!