Symptoms
Calcium deficiency causes the banana leaves to become chlorotic and later light brown necrosis appears from the top of the leaves.
Symptoms start on younger leaves, but growth is not restricted. The lower part of the leaves shows deformations in its shape; the margins are torn and parts of the leaves tend to curl inwards.
Reasons
Calcium deficiency
Boron deficiency shows similar symptoms, but the chlorosis and necrosis starts from the margin and not from the top of the leaves. Furthermore, the leaves are not torn.