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Bacterial leaf streak (Xanthomonas vasicola vasculorum)

Iowa State University Extension Plant Pathologists have identified and confirmed several different cases of bacterial leaf streak in corn this growing season. Bacterial leaf streak is relatively new to the United States, with the first case identified in 2016, though symptoms of the disease have been present in Nebraska since 2014. In this video Ed Zaworski, plant pathologist at Iowa State University, takes you into the Plant and Insect Diagnostic Clinic as he examines a sample of bacterial leaf streak in corn.

Bacterial Leaf Streak lookalikes

July 10, 2017 1:45 PM
Blog Post

Bacterial leaf streak is a new disease of corn that was confirmed in the U.S. last year - as if we don't have enough spots to diagnose on corn!  And, as you might expect, a lot of spots and streaks on corn can be misdiagnosed for bacterial leaf streak.

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Bacterial Leaf Streak of Corn

Bacterial leaf streak, caused by Xanthomonas vasicola pv. Vasculorum, was recently identified in Iowa. The disease has been found in field corn, seed corn, popcorn and sweet corn. Based on what we know about other bacterial diseases, the pathogen that causes bacterial leaf streak likely survives in corn residue and is spread by wind and rain/irrigation. The impacts on corn yield production are yet to be determined.
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Bacterial Leaf Streak Confirmed in Iowa

August 26, 2016
Bacterial Leaf Streak photo

Bacterial leaf streak (BLS) in corn was recently identified in Iowa. Bacterial leaf streak is a disease caused by Xanthomonas vasicola pv. vasculorum. The disease has been found on field corn, seed corn, popcorn, and sweet corn. Iowa State University Extension and Outreach has been working with the USDA, Iowa Department of Agriculture and Land Stewardship (IDALS), the Iowa Crop Improvement Association (ICIA) and surveying several counties in the state.

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