Nutritional/Physiological Disorders:Magnesium Deficiency
- Typical deficiency symptom is yellowing of outside section of the lamina in older leaves, which is due to its mobility in the plant (Image1).
- As the deficient leaf matures, chlorosis becomes more intense, and dark spots form, that later become necrotic.
- Affected leaves become intense golden yellow in colour.
- Leaf arrangement is affected, leading to a rosette appearance.
- Another characteristic symptom is a bluish-purple colouration on the petioles called blue sickness (Image2).
- When deficiency is severe, the basal section of the petiole separates and breaks from the pseudostem, causing early leaf senescence.