Cercospora leaf blight

scouted Sept. 7, 2022

Scientific Name
Cercospora kikuchii
Background
Soybeans in Carteret county, variety AG 59XF0, were scouted and it was observed that 50% of the field was affected by defoliation and dieback Upper trifoliates (looks like herbicide injury). No herbicide was sprayed. These symptoms are widespread.
Conclusion
The issue was identified as Cercospora blight of soybean. This disease is caused by the pathogen Cercospora kikuchii and although it's common in soybeans it rarely causes significant yield losses in North Carolina. Chemical management and cultural practices are both options to control Cercospora leaf blight.
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