Trichoderma for Strawberry: Natural Biofungicide for Crown Rot, Root Rot Control & Higher Fruit Yield

Trichoderma for Strawberry: Natural Biofungicide for Crown Rot, Root Rot Control & Higher Fruit Yield

Strawberry (Fragaria × ananassa) is a premium high-value fruit crop cultivated for fresh consumption, processing, desserts, beverages, jams, frozen products, and export. Commercial strawberry production requires healthy roots, vigorous crowns, balanced nutrition, abundant flowering, and continuous fruiting. Soil-borne fungal diseases such as crown rot, root rot, damping-off, black root rot, and Phytophthora infections are among the major causes of poor plant establishment, reduced fruit quality, and significant yield losses.

Trichoderma is a beneficial fungal biofungicide that naturally protects strawberry roots and crowns against harmful pathogens while improving soil microbial activity and promoting vigorous root development. Species including Trichoderma harzianum, Trichoderma viride, Trichoderma asperellum, and Trichoderma koningii colonize the rhizosphere, suppress disease-causing fungi, improve nutrient availability, and stimulate healthy plant growth throughout the crop cycle.

Unlike chemical fungicides that provide only temporary disease suppression, Trichoderma establishes a beneficial microbial population around the root zone, providing season-long biological protection while improving soil fertility and supporting sustainable strawberry production.

Benefits of Trichoderma in Strawberry

  • Promotes vigorous root and crown development.
  • Suppresses crown rot and root rot pathogens.
  • Improves nutrient and water uptake.
  • Enhances plant vigor and runner development.
  • Encourages healthy flowering.
  • Improves fruit set and reduces flower abortion.
  • Produces larger, brighter, and more uniform berries.
  • Improves fruit sweetness (°Brix), aroma, and firmness.
  • Enhances shelf life and transportability.
  • Reduces transplant shock and improves establishment.
  • Improves tolerance to drought and environmental stress.
  • Increases beneficial microbial activity in the rhizosphere.
  • Reduces dependence on chemical fungicides.
  • Improves long-term soil fertility.
  • Supports sustainable and organic strawberry cultivation.

Diseases Managed

Trichoderma helps suppress several economically important soil-borne diseases affecting strawberry, including:

  • Crown Rot
  • Root Rot
  • Black Root Rot
  • Phytophthora Crown Rot
  • Phytophthora Root Rot
  • Pythium Root Rot
  • Rhizoctonia Root Rot
  • Fusarium Wilt
  • Damping-off
  • Charcoal Rot (Macrophomina phaseolina)

Note: Trichoderma primarily controls soil-borne fungal diseases. Foliar and fruit diseases such as grey mould (Botrytis cinerea), powdery mildew, anthracnose fruit rot, and leaf spot require integrated crop management practices.

Mode of Action

Trichoderma protects strawberry plants through multiple biological mechanisms:

  • Rapidly colonizes the rhizosphere and crown region before pathogens establish.
  • Competes with harmful fungi for nutrients and root space.
  • Produces enzymes such as chitinase and glucanase that degrade fungal cell walls.
  • Releases natural antifungal metabolites that suppress pathogen growth.
  • Directly parasitizes disease-causing fungi through mycoparasitism.
  • Activates the plant's natural defense system (Induced Systemic Resistance).
  • Stimulates feeder root formation and root biomass.
  • Improves soil microbial diversity and nutrient availability.

These biological mechanisms provide season-long disease protection while promoting healthy plant growth and high-quality berry production.

Recommended Application

Runner Treatment

Dip strawberry runners or seedlings in a suspension prepared with 10–15 g of Trichoderma powder per litre of water for 20–30 minutes before transplanting.

Nursery Application

Mix 2–5 g of Trichoderma powder per nursery tray or polybag with the growing media before planting.

Soil Application

Apply 2–4 kg of Trichoderma per acre mixed with 50–100 kg of well-decomposed farmyard manure (FYM), vermicompost, or organic compost before planting and again during flowering.

Bed Application

Incorporate Trichoderma-enriched compost into raised beds before transplanting to establish beneficial microbial populations around the root zone.

Drip Irrigation

Apply compatible liquid Trichoderma formulations through drip irrigation according to the manufacturer's recommended dose.

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