Magnesium deficiency made worse by
- Sandy soils
- Acidic soils
- Potassium rich soils
- Soils receiving high potash applications
- Cold wet periods
Magnesium is important for
- Promotes leaf development and yield
- Increases mesocarp oil content
Symptoms
The leaflets (pinnae) of mature fronds show a yellowgreen chlorosis, starting on tips and margins and progressing toward the leaf base. A narrow area along the midrib remains green for a while.
Finally the leaflets turn yellow and brown, necrotic blotches develop on the margin.
Reasons
Magnesium deficiency
Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil.
Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.
Symptoms
The leaflets (pinnae) of mature fronds show a yellowgreen chlorosis, starting on tips and margins and progressing toward the leaf base. A narrow area along the midrib remains green for a while.
Finally the leaflets turn yellow and brown. Necrotic blotches develop on the margin.
Reasons
Magnesium deficiency
Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil.
Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.
Symptoms
Pinnae of older palm fronds become chlorotic, because Mg is translocated from older to younger leaves. At severe deficiency, the pinnae turn yellow, then brown, and desiccate, starting from the leaf tips.
Reasons
Magnesium deficiency
Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil.
Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.
Symptoms
Pinnae of older palm fronds become chlorotic, because Mg is translocated from older to younger leaves. At severe deficiency, the pinnae turn yellow, then brown, and desiccate, starting from the leaf tips.
Reasons
Magnesium deficiency
Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil.
Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.
Symptoms
Pinnae of older palm fronds become chlorotic, because Mg is translocated from older to younger leaves. At severe deficiency, the pinnae turn yellow, then brown, and desiccate, starting from the leaf tips.
Reasons
Magnesium deficiency
Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil.
Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.
Asia and Oceania
