Target spot

scouted Aug. 17, 2022

Scientific Name
Corynespora cassiicola
Background
Soybeans in Carteret county, variety 01, were scouted and observed 20% of the field was affected by SDS (fusarium) symptoms. The site is dry.
Conclusion
The cause of disease was identified as Target spot, caused by Corynespora cassiicola. This is a common pathogen in the state, but losses associated with it are rare. Infection requires high humidity and long periods of high moisture with free water resting on tissue surfaces. Cultural practices like crop residue destruction, managing weed hosts, and a crop rotation schedule that excludes hosts for several years are important to limiting disease losses.
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