Splitting and cracking: Deep cracks
Symptoms
The fruits can split/crack open and arils are exposed without any biotic cause. This leads to loss of market value and often makes the invaded fruit unfit for human consumption.
Causes
Boron deficiency, calcium and potash deficiency indirectly contribute in cracking. However, improper irrigation is the major cause.
Control
Cultivate tolerant varieties.
Irrigate the plants from fruit setting to maturity, with adequate quantity of water at regular intervals.
Give two sprays of boron @ (2 g/litre) at fruit enlargement stage and before fruit harvest.
Apply calcium and potash as per soil test values. This helps to reduce cracking during water stress.