Physiological disorders

a) Rosette and Bunch:

• It is caused by Zinc deficiency.
• Initial symptoms occur mostly on the branches in the top of the tree.
• Leaves becomes yellowish and mottled. In advance stage, leaflets becomes narrow and crinkled on lower branches.
• It can be controlled by spraying zinc sulphate on leaves twice or @ 2 pounds per 100 gallons of water.

b) Internal breakdown:

• The internal part becomes soft and watery.
• The actual cause is still unknown.