Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulfur
B Boron
Fe Iron
Mn Manganese
Zn Zinc

Banana - Chlorosis

Symptoms
Magnesium deficiency symptoms start on older leaves of the plants. Chlorotic zones are visible in the intercostal area near the leaf margin, and later necrotic spots develop in these zones. At further development, the necroses become larger and coalesce along the margin. The midrib of the leaves and a band around it remains green.

Reasons
Magnesium deficiency Potassium deficiency also shows chlorosis on the leaves, becoming necrotic later, but the necrosis starts from the leaf tips and does not form spots within the intercostal area of the leaves. Manganese deficiency shows similar symptoms to Mg deficiency, but the symptoms start on younger leaves and there is no band around the midrib that remains green.

Banana - Chlorosis

Symptoms
Magnesium deficiency symptoms start on older leaves of the plants. Chlorotic zones are visible in the intercostal area near the leaf margin, and later necrotic spots develop in these zones.

Reasons
Magnesium deficiency Potassium deficiency also shows chlorosis on the leaves, becoming necrotic later, but the necrosis starts from the leaf tips and does not form spots within the intercostal area of the leaves. Manganese deficiency shows similar symptoms to Mg deficiency, but the symptoms start on younger leaves and there is no band around the midrib that remains green.

Banana - Chlorosis

Symptoms
Magnesium deficiency symptoms start on older leaves of the plants. Marginal yellowing is followed by the occurence of necrotic spots within the chlorotic areas. The petioles can show a bluish-purple mottling ('blue sickness').

Reasons
Magnesium deficiency Potassium deficiency also shows chlorosis on the leaves, becoming necrotic later, but the necrosis starts from the leaf tips and does not form spots within the intercostal area of the leaves. Manganese deficiency shows similar symptoms to Mg deficiency, but the symptoms start on younger leaves and there is no band around the midrib that remains green.

Banana - Chlorosis

Symptoms
Magnesium deficiency symptoms start on older leaves of the plants. Marginal yellowing is followed by the occurence of necrotic spots within the chlorotic areas. The petioles can show a bluish-purple mottling ('blue sickness').

Reasons
Magnesium deficiency Potassium deficiency also shows chlorosis on the leaves, becoming necrotic later, but the necrosis starts from the leaf tips and does not form spots within the intercostal area of the leaves. Manganese deficiency shows similar symptoms to Mg deficiency, but the symptoms start on younger leaves and there is no band around the midrib that remains green.

Magnesium deficiency made worse by

  • Sandy soils
  • Acidic soils
  • Potassium rich soils
  • Soils receiving high potash applications
  • Cold wet periods

Magnesium is important for

  • Chlorophyll production and metabolic activator for carbohydrates, fats and proteins
  • Involved in P-transport
  • Direct effect on bunch weight and yield