How Does Trichoderma harzianum Promote Plant Health and Suppress Soil Pathogens?

Technical Introduction

Trichoderma harzianum is a widely studied soilborne fungus used as a biological control agent and plant growth promoter.
It colonizes the rhizosphere, antagonizes plant pathogens through mycoparasitism, competition, and production of antifungal compounds, and enhances nutrient uptake.
This fungus also induces systemic resistance in plants, improving their defense against diseases.

Applications

1. Biocontrol of Soil-Borne Diseases

• Effective against pathogens like Fusarium, Rhizoctonia, Pythium, and Sclerotinia causing root rot and damping-off.

• Used in vegetable, fruit, and ornamental crops to reduce chemical fungicide use.

2. Plant Growth Promotion

• Enhances root growth and nutrient availability by producing enzymes that decompose organic matter.

• Improves overall plant vigor and stress tolerance.

3. Soil Health Improvement

• Balances soil microbial populations and improves soil structure.

Advantages

• Eco-Friendly: Safe for humans, animals, and beneficial microbes.

• Versatile Application: Available as powders, granules, or liquid formulations for seed treatment, soil drench, or foliar spray.

• Sustainable: Supports integrated pest management and organic farming practices.

• Resilient: Adapts to diverse soil and climatic conditions.

Typical Parameters

FAQs

Q1: How is T. harzianum applied?
A1: Typically as seed treatment, soil drench, or incorporated into potting media.

Q2: Can it be combined with fertilizers and pesticides?
A2: Generally compatible, but avoid broad-spectrum fungicides that may harm beneficial fungi.

Q3: How long does it take to control pathogens?
A3: Disease suppression can be observed within weeks under favorable conditions.

Q4: Is it safe for beneficial soil organisms?
A4: Yes, it selectively targets pathogens without harming beneficial microbes.

Q5: Does T. harzianum improve plant growth?
A5: Yes, by enhancing nutrient availability and inducing systemic resistance.