Soybean Disease Risks Maps

For period of July 31 – Aug 29, Date of Issue: August 1, 2021 
Closeup ofreen leaves of soybean plant, agricultural landscape
CLICK ON DISEASE FOR RISK FORCAST
One-Month Weather Outlook

Over the next 30 days temperatures will be warmer than normal north of I-80 and normal farther south.  It will be dryer west of I-35, and wetter than normal in OH, IN and KY.  During the next two weeks temperatures are predicted to be warmer than normal for the entire Corn Belt.  Rainfall will be higher than normal east of the Mississippi River, and normal or dryer for areas west of the River.  

White Mold Risk Summary

The risk of soybean white mold is moderate to high near the Great Lakes

Next two-week risk interpretation 

The conditions are moderately or highly favorable for white mold in the areas surrounding the Great Lakes during the next two weeks.   In at-risk areas consider treatment if the soybeans are still flowering, especially in fields with a history of the disease.

White Mold growth on soybean stems
ONE-MONTH RISK MAP
One-Month Weather Outlook

Over the next 30 days temperatures will be warmer than normal north of I-80 and normal farther south.  It will be dryer west of I-35, and wetter than normal in OH, IN and KY.  During the next two weeks temperatures are predicted to be warmer than normal for the entire Corn Belt.  Rainfall will be higher than normal east of the Mississippi River, and normal or dryer for areas west of the River.

Brown Spot Risk Summary

The risk of soybean brown spot slightly decreases across the Corn Belt.

Next two-week risk interpretation 

During the next two weeks conditions are moderately favorable for brown spot.  In at-risk areas scout fields with a history of brown spot infections in prior seasons.  If brown spot keeps moving up in the canopy, consider spraying.  

Septoria in Soybean Leaf
ONE-MONTH RISK MAP
One-Month Weather Outlook

Over the next 30 days temperatures will be warmer than normal north of I-80 and normal farther south.  It will be dryer west of I-35, and wetter than normal in OH, IN and KY.  During the next two weeks temperatures are predicted to be warmer than normal for the entire Corn Belt.  Rainfall will be higher than normal east of the Mississippi River, and normal or dryer for areas west of th

Frogeye Leaf Spot Risk Summary

The risk of disease remains moderate to high in the southern areas of the map. 

Next 2-week risk interpretation 

For the next two weeks weather conditions are highly favorable or moderately favorable for FLS in the southern Corn Belt.  In at-risk areas consider spraying susceptible cultivars that have yet to reach R5.  Scout susceptible cultivars and spray if FLS is found on the upper leaves.

Frogeye Leaf Spot, Cerospora sojina, fungus
ONE-MONTH RISK MAP
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