Twisted whorls and yellow leaves making an appearance

June 25, 2020 1:09 PM
Blog Post

 M. Licht).
Leaf ripples and yellowing shortly after the whorl unfurls (photo credit: M. Licht).

It is that time of year when twisted whorls and yellow leaves are making an appearance in corn fields across the state. This is commonly referred to by many names, regardless, it is nothing to be overly concerned about unless it is very prevalent in your fields.

High prevalence could be related to growth regulator herbicides or even a hybrid with a higher tendency for occurrence. Wait a couple days with sunlight and a little wind and you’ll hardly notice it even existed.

Here is more information on rapid growth syndrome.


Mark Licht Assistant Professor

Dr. Mark Licht is an assistant professor and extension cropping systems specialist with Iowa State University Extension and Outreach. His extension, research and teaching program is focused on how to holistically manage Iowa cropping systems to achieve productivity, profitability and en...

Zachary Clemens Communications Specialist I

Zach Clemens grew up in Colorado, but migrated to Iowa as a young adult. He is an alumnus of Iowa State and is a former newspaper reporter and editor. He works to communicate agronomy news and real time updates for agriculture producers. He splits his time with the IPM program and runs the H...