Biological control of parasitic nematodes using alga-bacterium-fungus consortia

Overview

Plant-parasitic nematodes pose a significant threat to agriculture worldwide, and conventional chemical nematicides raise concerns about environmental contamination and sustainability. This project develops an innovative biological control approach using synthetic consortia of microalgae, bacteria, and fungi to suppress nematode populations while delivering agronomic benefits to host crops. By leveraging the natural mutualism among these three organism groups, the technology offers a dual-action solution: nematode inhibition through naturally secreted nematicidal compounds, and enhanced crop nutrition and growth through symbiotic relationships. This approach aims to replace chemical nematicides with an efficient, sustainable, and environmentally responsible method for crop protection.

Technical specifications

Core technology:

• Synthetic microbial consortia combining microalgae, bacteria, and fungi that establish stable mutualistic relationships similar to lichen symbiosis
• Each organism in the consortium contributes nematicidal activity through natural compound secretion
• Symbiotic interactions improve the efficiency and longevity of nematode control compared to single-organism approaches
• Host crops gain additional nutrients from the symbionts, improving growth traits and productivity

Development approach:

• Collection and screening of candidate strains from microalgae, bacteria, and fungi with known nematode-inhibiting or plant growth-promoting properties
• Systematic testing of interactions and symbiosis among candidate organisms to identify stable, effective combinations
• Validation of selected consortia against nematodes and host crops to confirm dual nematode control and crop benefit

Technology readiness level

This project is at an early research and development stage. The foundational hypothesis is supported by recent findings demonstrating stable symbiosis and mutualism among microalgae, bacteria, and fungi, as well as evidence that each group can independently produce nematicidal compounds. The current research plan focuses on strain collection, interaction testing, and combination optimization. Future validation will assess consortium performance against nematodes and host crops in controlled settings, representing the next step toward broader agricultural application.