Cercospora Leaf Blight

Guy Padgett  |  8/19/2011 11:34:26 PM

Cercospora leaf blight.

Go to Fungal Foliar Diseases Home Page

Go to Soybean Disease Atlas Home Page


Click on the links above to go to the Fungal Foliar Diseases home page or the Soybean Disease Atlas home page.


Cercospora Leaf Blight (Cercospora kikuchii)
John Rupe
University of Arkansas


Cercospora leaf blight is a late season disease that is often mistaken for early senescence. Symptoms are first observed at the beginning of seed set. Extensive losses from the disease have been reported in some years. While this fungus also attacks pods and causes purple seed stain, there is no consistent relationship between the occurrence of leaf spot and purple seed stain.

Symptoms are first observed at the beginning of seed set. Small, reddish-purple, angular to irregular lesions occur on the upper leaves which become leathery and dark purplish-red with bronze highlights. This discoloration may extend to the upper stems, petioles, and pods. Heavily infected leaves rapidly turn yellow and fall, mimicing senescence. Lower leaves remain green.

Although some cultivars possess resistance, control is primarily achieved by application of foliar fungicides starting at early pod set.
Rate This Article:

Have a question or comment about the information on this page?

Innovate . Educate . Improve Lives

The LSU AgCenter and the LSU College of Agriculture

Top