Hirsutella thompsonii for Mite Control: Complete Guide for Farmers

Mites are tiny but highly destructive pests that suck plant sap, causing leaf curling, yellowing, and reduced crop yield. A powerful biological solution is Hirsutella thompsonii, a naturally occurring fungus that specifically targets and controls mites in an eco-friendly way.

🌱 What is Hirsutella thompsonii?

Hirsutella thompsonii is an entomopathogenic fungus that infects and kills mites by penetrating their body and growing inside them. It is widely used as a biopesticide in organic farming and Integrated Pest Management (IPM).

🐛 Target Pests (Mites)

Hirsutella thompsonii is highly effective against:

  • Red spider mites
  • Yellow mites
  • Broad mites
  • Tea mites
  • Coconut eriophyid mites

🔬 How Hirsutella thompsonii Works

Step-by-Step Mode of Action:

  1. Spore Attachment
    Spores attach to mite body
  2. Germination
    Germinate under humid conditions
  3. Penetration
    Fungus penetrates mite cuticle
  4. Internal Growth
    Multiplies inside the mite
  5. Death of Mite
    Mite dies within 3–5 days
  6. Fungal Growth Spread
    Dead mites show fungal growth, spreading infection

🌾 Crops Where It Works Best

  • Vegetables (chilli, tomato, brinjal)
  • Fruits (grapes, pomegranate, citrus)
  • Plantation crops (tea, coconut)
  • Flower crops

🌿 Benefits of Hirsutella thompsonii

  • Target-specific for mites
  • Eco-friendly and residue-free
  • Safe for beneficial insects
  • No resistance development
  • Suitable for organic farming
  • Effective under high humidity

⚙️ Application Method

1. Foliar Spray (Best Method)

  • Mix with water
  • Spray on affected plants
  • Focus on leaf underside where mites reside

📊 Dosage (General Guide)

  • Liquid: 2–5 ml per liter of water
  • Powder: 5–10 g per liter

👉 Repeat every 7–10 days

⏱️ Best Time to Apply

  • Early stage of infestation
  • Morning or evening
  • During humid conditions

⚠️ Best Conditions for Effectiveness

  • High humidity (70–80%)
  • Temperature: 20–30°C
  • Avoid direct sunlight

🚫 Common Mistakes to Avoid

  • Spraying in dry conditions
  • Using with chemical acaricides
  • Poor leaf coverage
  • Incorrect dosage

🔄 Compatible Bio Inputs

Works well with:

  • Beauveria bassiana
  • Verticillium lecanii

👉 Integrated Pest Management (IPM)

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