- Young leaves are smaller than normal and may be curled.
- Yellowing proceeds from the marginal area between the veins towards the center.
- The youngest leaves show necrotic tips.
- Stems can crack due to the low cell strength.
- Plants are stunted or dwarfed as the internodes are shortened.
- Growing points die back.
- Flowering and fruit set is poor.
- Fruits are distorted with a poor skin finish.
- Hollow heart is more common.
- Deficiencies usually occur when soil moisture contents are too high, or under conditions of high pH.
Control :-
- Use of calcium nitrate with added boron fertliizer @ 25 kg/acre.
- Use of phosphate solubilizing bacteria @ 4 kg per acre.
- Spray of boron 20% @ 200 gm per acre twice in 10 days at flowering stage.
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