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Agriculture

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Why there are black spots on tomatoes?

The causes might be,

  • The lack of Calcium supply
  • The rise of humidity in the night time would block the transport of Calcium to immature leaves
  • Fertilizer with high ratio of Ammonium, Nitrogen, Potassium and/or Magnesium would block the Calcium absorption
  • High salinity and acidity in the soil would be another cause for lack of Calcium absorption

The solutions are as follows;

  • Protect the moisture of the soil. A  mulch can be used for  this
  • Provide sufficient Calcium for the plants
  • Use fertilizer without blocking the absorption of fertilizer

For more information please contact

Thiwanka: 0722953889

Practical Answers Sri Lanka

Practical Action Sri Lanka

No 05, Lionel Edirisinghe Mawatha,Colombo 05,Sri Lanka.

Tel : +94-112829412,  Fax: +94-112856188

Email : This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Contact Us

Janathakshan Project

Practical Action Regional Office (Sri Lanka, India, Pakistan),

No 05, Lionel Edirisinghe Mawatha,

Colombo-5, Sri Lanka.

 

Tel : 94-11-2829412

Fax : 94-11-2856188

Email : janathakshan@practicalaction.org.lk