Trichoderma viride is a beneficial soil-borne fungus widely used in agriculture as a biocontrol agent and plant growth promoter. It belongs to the genus Trichoderma, which also includes other important species such as Trichoderma harzianum and Trichoderma asperellum. These fungi enhance plant growth, suppress soil-borne pathogens, and improve crop yield through various mechanisms, including mycoparasitism, competition, and induction of systemic resistance in plants.
Effect on Plant Growth
Trichoderma viride promotes plant growth by:
Enhancing Nutrient Availability – It solubilizes phosphorus, fixes nitrogen, and increases micronutrient uptake.
Producing Phytohormones – It secretes auxins, gibberellins, and cytokinins, which stimulate root and shoot development.
Improving Root Colonization – It forms symbiotic relationships with plant roots, increasing their surface area for better water and nutrient absorption.
Studies have shown that T. viride significantly improves seedling vigor, plant height, and biomass compared to untreated controls.
Effect on Crop Yield
Field trials with crops such as wheat, rice, tomatoes, and cucumbers have demonstrated that T. viride inoculation leads to:
– Increased grain and fruit yield
– Enhanced resistance to abiotic stresses (drought, salinity)
– Reduction in disease incidence (e.g., damping-off, root rot)
Comparisons with T. harzianum and T. asperellum indicate that while all three species improve yield, their efficiency varies depending on crop type and environmental conditions.
Four Major Applications of Trichoderma viride
Biocontrol of Plant Pathogens – T. viride suppresses fungal pathogens like Fusarium, Rhizoctonia, and Pythium through mycoparasitism and antibiotic production.
Seed Treatment – Coating seeds with T. viride enhances germination and protects seedlings from soil-borne diseases.
Soil Amendment – Application in compost or as a biofertilizer improves soil health and microbial activity.
Induced Systemic Resistance (ISR) – It primes plants to activate defense mechanisms against pathogens and pests.
Comparison with Trichoderma harzianum and Trichoderma asperellum
T.harzianum – More effective against a broader range of pathogens, widely used in commercial biofungicides.
T.Asperellum – Shows higher stress tolerance and better performance in saline or arid soils.
Conclusion
Trichoderma viride is a versatile fungus that enhances plant growth, boosts yield, and provides sustainable disease management. Its applications, along with those of T. harzianum and T. asperellum, make it a key component in integrated pest management (IPM) and organic farming systems. Further research by Dora team will focus on optimizing the formulation and field application method to achieve maximum efficacy.