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 Associate Professor

Dr. Mark Licht is an associate 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...