Secondary and micro nutrients in sugarcane

Deficiency Symptoms:

Calcium:

• Mottling and chlorosis of older leaves.
• Spindles often become necrotic at the leaf tip and long margins.
• Rusty appearance and premature death of older leaves.

Sulphur:

• Chlorotic young leaves. 
• Narrower and shorter leaves with faint purplish tinge.
• Slender stalks.

Magnesium:

• Mottled or chlorotic appearance at the tip and margins.
• Red necrotic lesions resulting in "rusty" appearance.
• Internal browning of rind.         
  

Fig: Magnesium Deficiency symptom

Copper:

• Green splotches with leaves eventually showing bleaching.
• Stalk and meristems lack turgidity.
• Reduced internodal length and tillering.

Iron:

• Varying degrees of chlorosis.
• Interveinal chlorosis from tip to base of leaves.

Zinc:

• The deficiency symptom can be recognized by the stunted growth and patchy appearance.

Boron:

• Distorted leaves.
• Formation of translucent lesions or water sacks along leaf margins.
• Brittle and bunched with many tillers.
• Death of apical meristem.

Molybdenum:

• Short longitudinal chlorotic streaks on the top one-third of the leaf.
• Short and slender stalks.
• Slow vegetative growth.

Manganese:

• Occurrence of interveinal chlorosis from leaf tip towards the middle of leaf.
• Bleaching of leaves under severe deficiency.