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Streptomyces-Based Bioformulation to Control Wilt of Morchella sextelata Caused by Pestalotiopsis trachicarpicola

Summary

Researchers discovered two beneficial bacteria called Streptomyces that can protect morel mushrooms from a harmful fungus causing wilt disease. When applied to morel cultivation fields, these bacteria not only prevented disease but also increased mushroom yields by about 30% compared to untreated fields. This natural biocontrol approach offers farmers an eco-friendly alternative to chemical treatments while boosting their harvests.

Background

Morchella sextelata (morels) are highly valued fungi with significant nutritional and commercial importance. However, rapid expansion of morel cultivation has led to severe disease outbreaks, with wilt disease caused by Pestalotiopsis trachicarpicola reaching incidence rates of 80% in China.

Objective

This study aimed to isolate and characterize Streptomyces species from M. sextelata rhizosphere soil that exhibit antagonistic activity against P. trachicarpicola, and to evaluate their biocontrol efficacy in field cultivation.

Results

Both Streptomyces sp. F16 and F19 exhibited potent antifungal activity against P. trachicarpicola through multiple mechanisms including volatile compounds and fermentation filtrates. Field trials showed that 5-fold diluted filtrates from both isolates achieved yields of 299.6 g/m² and 277.65 g/m² respectively, significantly surpassing control yields of 231 g/m².

Conclusion

Streptomyces-based bioformulations effectively control P. trachicarpicola-induced wilt disease in M. sextelata while simultaneously promoting fruit yield. These findings support the development of sustainable, eco-friendly biocontrol strategies for morel cultivation.
  • Published in:Journal of Fungi (Basel),
  • Study Type:Experimental Research,
  • Source: 10.3390/jof11060452, 40558963
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