Crop-associated bacteria as bioinoculants for fungal and nematode disease control

Overview

This research offers a sustainable alternative to chemical pesticides by leveraging crop-associated bacteria and their secondary metabolites as bioinoculants for controlling fungal and nematode plant diseases. The overuse of synthetic fertilizers and pesticides in agriculture poses significant environmental risks, creating a strong demand for eco-friendly crop protection solutions. Bacterial strains isolated from healthy plants under biotic and abiotic stresses produce inhibitory compounds such as enzymes, antibiotics, and volatile substances that can suppress major plant pathogens.

The solution targets key pathogens including several species of Fusarium, Macrophomina, Lasiodiplodia, Neofusicoccum, and the root-knot nematode Meloidogyne, with demonstrated efficacy in strawberry, blueberry, asparagus, and almond crops. This approach benefits growers seeking to reduce chemical inputs, comply with sustainability regulations, and maintain crop yields through biological disease management.

Technical specifications

Key features:

• Library of more than 500 bacteria isolated from healthy plants across multiple crops under various stress conditions
• Strains characterized for biocontrol enzyme activities including chitinase, peptidase, cellulase, and β-glucosidase production
• Demonstrated up to 100% in vitro growth inhibition of major fungal pathogens
• Validated in vivo efficacy in greenhouse and field assays against fungal and nematode pathogens in strawberry, blueberry, asparagus, and almond plants
• Includes endophytic strains with potential for colonization and long-term plant protection
• Future development of bioformulations optimized for field application through high-throughput phenotyping (BIOLOG system) and genome mining for biotechnological potential

Technology readiness level

The technology has advanced beyond initial discovery, with a characterized bacterial library and demonstrated in vitro pathogen inhibition at levels up to 100%. Promising results have been obtained under both greenhouse and field conditions across multiple commercial crops. Next steps include identification of active secondary metabolites via UPLC-MS/MS, genome sequencing and mining of the most promising strains, optimization of culture conditions, and development of field-ready bioformulations. The project requires a postdoctoral researcher and associated consumables over 24 months to advance toward commercial deployment.