Spotted: The Soybean Disease Frogeye Leaf Spot

 

Reports of frogeye leaf spot in soybeans are emerging as humidity and temperatures increase.

Frogeye leaf spot is a foliar soybean disease caused by the fungus Cercospora sojina.

 

Frogeye leaf spot can be identified by the dark red-brown or purple rings surrounding lesions. Severe defoliation can occur when lesions merge and cover large areas of leaves.

 

According to the University of Minnesota, use these management practices to help control frogeye leaf spot in your fields: 

  • Bury infested residue
  • Rotate soybeans with a non-bean crop to reduce inoculum levels
  • Apply fungicide between R1-R3 stages when disease is present
If you have frogeye leaf spot this year, it will likely make another appearance next year. When planning for next season, certain varieties of soybeans offer tolerance to the disease. Agronomists recommend selecting soybean varieties with a frogeye leaf spot rating of 3 or lower in continuous soybean fields, and 4 or lower in a soybean-corn rotation.
 
To find out the frogeye leaf spot tolerance rating of particular Golden Harvest varieties, enter relative maturity needs or a specific variety name in our online product finder.
 
Contact your local independent Golden Harvest Seed Advisor with questions or for additional agronomic insights.
 
Photos are either the property of Syngenta or used under agreement.
 
Syngenta hereby disclaims liability for third-party websites.
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