Sulphur (S) deficiency symptoms

Sulphur (S) deficiency symptoms:

• Young leaves become yellowish-white.
• As the deficiency progresses, necrotic patches appear on leaf margins and the veins become thicker.
• Sometimes morphology of the leaf changes and a bladeless leaf appears.
• Plant growth is stunted and the bunches are small with chocked appearance.

Control measures:

In its elemental form Sulphur is solid and insoluble in water.  So finely ground Sulphur has to be incorporated in to the soil enabling the micro organisms to speedily oxidize it and converts it in to Sulphate form.

Most of the Sulphur requirement of the plant is met from the sulphates applied in the form of Ammonium sulphate (S-23%), Gypsum (Calcium sulphate – ‘S’ - 18%), Sulphate of Potash (S- 18%) Etc. 

In case of non-application / limited application of the above sulphates, ‘S’ nutrient can be supplemented by applying 20 gm /plant of Bentonite Sulphur (‘Gromor’ from Coromandel),  which contains about 90% of Sulphur in elemental form and only 10% as Bentonite clay. 

1. Through Drip Irrigation:

                   Apply liquid Sulphur @ 5 L/1000 plants.

                                      (OR)
                   Apply 20 gm of Bentonite Sulphur (‘Gromor’) in 2 doses.
                                      (OR)
                   Apply 100 gm of Sulphate of Potash in 4 to 5 split doses. 
                                      (OR)
                   Apply 100 gm of Ammonium sulphate.

2. Manual application:

                   Apply 20 gram of Sulphur granule/plant.
                                     (OR)

                  Apply 1 kg of Gypsum per plant and irrigate copiously.

Regards,

A.Vishnu Sankar



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