Boron (B) deficiency symptoms

Boron (B) deficiency symptoms:

• Symptoms include marginal leaf curing and deformation, and most commonly white stripes appear perpendicular to the veins on the young emerging leaves.
• The new leaves may have an incomplete lamina similar to sulphur and calcium deficiency with thickening of secondary veins.
• Inhibition of root and flower formation is also observed in the affected plants.
• Boron and Calcium deficiency symptoms tend to overlap. See Calcium deficiency pictures also. 
• Once a plant shows of signs of deficiency, take immediate remedial steps suggested here below, since the plants will not fully recovery once the damage is already happened.

Control Measures:

a.  Apply 10g Borax/plant in 3^rd month or when deficiency occurs, once only. 
                                                (OR)

b.  Spray Boric acid @ 1g/litre of water 2-3 times, weekly.
                                                (OR)
c. Spray Solubor @ 1g/litre of water 2 times in a month. (Excess application will harm the plant).
                                                (OR) 
d. Apply Sodium tetraborate @ 25 gms per plant and irrigate immediately.

Picture 1: Boron deficiency symptom:

(The central new leaves have incomplete lamina).

Picture 2: Boron deficiency symptom:

(The central new leaves have incomplete lamina).

Picture 3 Boron deficiency symptom:

(The central new leaves have incomplete lamina).

Picture 3 Calcium + Boron deficiency symptom: Deformed and whitish heart leaf. 

Picture 4: Early foliar symptom of calcium + boron deficiency - Wrinkled leaf.

Picture 5: Early foliar symptom of calcium + boron deficiency- Spike leaf in which the lamina of new leaves is deformed or almost absent). 

 

 Picture 6: Boron deficiency symptom: Deformed leaves and improper filling and cracking of fruits.

Regards,

A.Vishnu Sankar

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