Biodegradable biocontrol method for managing TR4 fungal disease in banana crops
A biological control approach using Trichoderma reesei (CSR-T-3) to combat Fusarium wilt caused by Fusarium oxysporum f. sp. cubense Tropical Race 4 (Foc TR4), one of the most destructive diseases in global banana production. The method leverages mycoparasitism and antifungal metabolites to suppress the pathogen, offering a sustainable alternative for protecting Cavendish cultivars.
Overview
Fusarium wilt caused by Fusarium oxysporum f. sp. cubense Tropical Race 4 (Foc TR4) is one of the most devastating diseases affecting banana production worldwide. First identified in Southeast Asia in the early 1990s, the pathogen has since spread across northern Australia, China, Indonesia, Malaysia, and Taiwan, causing yield losses of 70–100% and significant economic damage estimated at US$ 388.1 million. This solution offers a biodegradable, biologically based method for controlling TR4 using Trichoderma reesei (isolate CSR-T-3), isolated from banana rhizosphere ecosystems. The approach provides banana growers with a sustainable alternative to chemical fungicides, helping protect Cavendish cultivars and other susceptible varieties from collapse.
Technical specifications
Biocontrol mechanism:
- Mycoparasitism — Trichoderma reesei directly attacks and parasitizes the Foc TR4 pathogen
- Antifungal metabolite production — Generates compounds such as iturin C and β-caryophyllene that inhibit fungal growth
- Root colonization — Trichoderma species colonize the epidermal root surface, establishing a protective barrier
- Induced plant resistance — Stimulates the host plant to produce secondary metabolites and defense-related enzymes, including elevated phenol content
Key features:
- Isolated from biologically stressed (wilt-suppressive) and abiotically stressed (salt-affected) banana rhizosphere ecosystems
- Targets gene expression pathways related to fusaric acid biosynthesis in Fusarium and cellulolytic enzyme activity in T. reesei
- Environmentally friendly and biodegradable, reducing reliance on synthetic chemical fungicides
Technology readiness level
The technology is at the laboratory validation stage. The biocontrol efficacy of three Trichoderma isolates has been assessed, with CSR-T-3 (T. reesei) identified as the top performer. Planned future validation includes in vitro antagonistic assays, scanning electron microscopy analysis of dual culture interactions, in vivo pot culture trials, LC-MS analysis of antifungal metabolites, gene expression profiling, biochemical defense enzyme analysis, and bioformulation development with optimized application techniques. Further field validation and bioformulation scale-up are needed before commercial deployment.
About International Centre for Genetic Engineering and Biotechnology
The International Centre for Genetic Engineering and Biotechnology is an intergovernmental, non-profit research and training organization operating laboratories in Trieste, New Delhi, and Cape Town. Its campuses provide co-located labs and shared core facilities that enable collaborative R&D, while training and fellowship programs create sustained talent pipelines for partners. Proximity to innovation parks and leading universities at each site, plus biosafety and policy advisory services, helps industry navigate translation and regulatory contexts across regions. Research is supported by member-state contributions and competitive grants from national and international agencies. A dedicated technology transfer office manages IP, licensing, and commercialization across sites.
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