Harnessing Local Entomopathogenic Fungi to Control Capnodis tenebrionis: A Sustainable Pest Solution

Introduction

The Capnodis tenebrionis beetle is a destructive pest targeting fruit trees and vineyards across Mediterranean regions. Its larvae bore into roots, causing severe damage, tree decline, and economic losses. Conventional pesticides have struggled to control this pest effectively, prompting scientists to explore biological alternatives like entomopathogenic fungi (EPF).

A recent study evaluated the effectiveness of local EPF isolates in targeting the eggs of Capnodis tenebrionis, offering a promising eco-friendly solution for orchard pest control.

Why Entomopathogenic Fungi?

EPF are naturally occurring fungi that infect and kill insects by penetrating their exoskeleton, spreading internally, and releasing toxins. They are:

• Eco-Friendly: Safe for beneficial insects and pollinators.
• Self-Sustaining: Persist in the environment, offering long-term pest suppression.
• Resistance Management Tools: Reduce reliance on chemical pesticides.

Key Findings from the Study

1. High Egg Mortality Rates: Local isolates of Beauveria bassiana and Metarhizium anisopliae achieved over 80% egg mortality in laboratory conditions.
2. Strain Variability: Some isolates were more virulent than others, indicating the potential for strain selection and breeding.
3. Environmental Adaptability: Local strains adapted well to native soil and climate conditions, increasing field application potential.

Advantages for Farmers

• Cost-Effective: Local production reduces import dependency on commercial biopesticides.
• Integrated Pest Management (IPM) Ready: Fits into existing IPM strategies alongside cultural and mechanical controls.
• Organic Farming Friendly: Compliant with organic certification standards.

Future Directions

• Field Trials: Testing under real-world conditions to validate lab results.
• Formulation Development: Enhancing shelf-life and application methods.
• Combination Strategies: Integrating EPF with other biological agents for synergistic effects.

Conclusion

The study underscores the potential of local entomopathogenic fungi as a biological control agent against Capnodis tenebrionis. By replacing or reducing chemical pesticide use, these fungi pave the way for sustainable and environmentally friendly orchard management practices.

Reference

Yiğit, T., Oksal, E., Karakuş, Y., & Yiğiter, B. (2025). Effectiveness of local entomopathogenic fungal isolates against eggs of Capnodis tenebrionis Linnaeus (Coleoptera: Buprestidae). Egyptian Journal of Biological Pest Control, 35(1), 32. https://doi.org/10.1186/s41938-025-00871-2

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