Root rot disease

Causal Organism:

Phythium, Phytopthora, Rhizoctonia, Fusarium

Causes of Root Rot:

There are two causes for root rot

  1.  Main cause is poorly drained or overwatered soils. These soggy conditions prevent roots from absorbing all the oxygen they require to live. As the oxygen-starved roots die and decay.
  2. Another cause of root rot is weakened roots. They are more susceptible to soil fungus, The fungus may be present but dormant in the soil for a long time; when the soil becomes waterlogged, the spores can come to life and attack the roots, causing them to rot and die.



  • Gradual or quick decline without an obvious reason.
  • Stunted or poor growth.
  • Small, pale leaves.
  • Wilted, yellowed, or browned leaves.
  • Branch dieback.
  • Thinning of the canopy.
  • On some species, the fungus grows up from the roots in the inner bark and causes cankers, or sunken dead areas.

Target crops: Tomato, Brinjal, Potato, Cotton etc

Control measures:

  • Root rot diseases are best controlled by prevention.
  • Overwatering should be avoided.
  • Proper irrigation channel in the field will help to avoid this disease.
  • Weeds should be controlled as they can be a reservoir of infection.
  • Infected plants should be burned.
  • Soil sanctifying and seed purification will be needed for suppress this fungal disease


Applicable to prevent the disease: “Bio-derma” (Trichoderma harzianum) marketed by Ispahani Agro Limited is very much effective to manage the soil born disease like root rot.


Dosage of Bio-darma Solid:


  • Main land     : The last cultivation of land, 8-10 kg Bio darma solid per bigha (33 decimal).
  • Seed bed      :  In 1 meter * 10 meter seed bed 250 gram Bio darma solid.
  • Pit                  :  100 gram Bio darma solid in every pit before 7 days of sowing or transplanting.
  • Pot                   : 10 gram Bio darma solid in 1 pot  
  • Infected plant  : 50 gm Bio-darma would be mixed with the bottom of the infected crops.

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