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Characterization of Setophoma henanensis sp. Nov., causing root rot on peanut

Summary

Researchers in China discovered a new fungus called Setophoma henanensis that causes root rot in peanuts. This fungus was found in peanut fields across Henan Province and can also infect other crops like corn, wheat, and peppers. The good news is that the fungus is sensitive to commonly used fungicides, which can help farmers control the disease.

Background

Peanut root rot is a significant disease causing economic losses worldwide. In 2021, symptoms of peanut root rot were observed in five cities of Henan province, China. This study aimed to identify and characterize fungal isolates from diseased peanut roots.

Objective

To identify and characterize a novel Setophoma species causing peanut root rot based on morphological features and multilocus phylogenetic analysis. To evaluate the pathogenicity, host range, and fungicide sensitivity of the new species.

Results

Isolates were identified as a new species named Setophoma henanensis based on phylogenetic analysis and morphological characteristics. Koch’s postulates confirmed S. henanensis could cause root rot disease in peanuts. The pathogen demonstrated a wide host range, infecting corn, wheat, pepper, and Welsh onion. All tested fungicides showed strong inhibitory effects, with S. henanensis being most sensitive to difenoconazole.

Conclusion

This is the first report of S. henanensis as a new pathogen of peanut root rot worldwide. The species shows a wide host range and sensitivity to multiple fungicides, providing a basis for developing control strategies and epidemiological research.
  • Published in:BMC Microbiology,
  • Study Type:Original Research,
  • Source: 10.1186/s12866-025-04057-6
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