Cercospora leaf spot
scouted Oct. 7, 2022
- Scientific Name
- Cercospora kikuchii
- Background
- Soybeans in Wilson county, variety AG56XF1, were scouted and observed 100% of the field was affected by scars on the stalk. This symptom was widespread. These soybeans were planted behind wheat. The soybeans were irrigated 5-6 times at about 0.2”. No fungicide or insecticide was applied. Flexstar GT applied post. Beans are have a large population of kudzu bugs and a few stink bugs. The ground is covered with kudzu bugs with fungus and aborted pods. The pods that are present, but the beans have have not developed. Very few pods on plant.
- 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.
- Resources
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- No resources have been added.
