Zeolite substrate characterization for Metarhizium robertsii inoculation

Area of Science:

• Mycology
• Mineralogy
• Biotechnology

Background:

• Entomopathogenic fungi are crucial for biological control.
• Metarhizium robertsii is a significant fungal species for pest management.
• Zeolites are porous minerals with potential applications in agriculture.

Purpose of the Study:

• To assess the biocompatibility of zeolite as a substrate for Metarhizium robertsii.
• To lay the groundwork for developing a novel biological control agent.

Main Methods:

• Fungal strains of Metarhizium robertsii were isolated and identified using ITS sequencing.
• Zeolite characterization via X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy-Dispersive Spectroscopy (EDS).
• Inoculation of zeolite with M. robertsii and subsequent SEM analysis after five days.

Main Results:

• Zeolite composition confirmed as a Heulandite and Clinoptilolite mixture, rich in oxygen, silicon, and aluminum.
• SEM imaging showed Metarhizium robertsii conidia and hyphal formation on zeolite particles.
• Evidence of fungal survival and growth on the zeolite substrate under laboratory conditions.

Conclusions:

• Zeolite exhibits biocompatibility with Metarhizium robertsii.
• Zeolite shows potential as a viable substrate for maintaining entomopathogenic fungi.
• This study supports the development of zeolite-based biological control agents.