Symptoms
Recently mature leaves show interveinal chlorotic mottling. On closer examination one may detect pale, watery patches with a fine brown border, especially towards the leaf margins. With severe manganese deficiency, brown necroticspots may be shown on the leaf surface. Numerous purplish-brown spots may appear on the leaf stalk or stem.
Reasons
Manganese deficiency.
While rarely seen, transient deficiencies can occur in sandy or peaty soils of a high pH, and can be overcome by using micronutrient sprays (manganese is not very mobile in the plant).
Melons - Chlorosis
Symptoms
Recently mature leaves show interveinal chlorotic mottling. On closer examination one may detect pale, watery patches with a fine brown border, especially towards the leaf margins. With severe manganese deficiency, brown necroticspots may be shown on the leaf surface. Numerous purplish-brown spots may appear on the leaf stalk or stem.
Reasons
Manganese deficiency.
While rarely seen, transient deficiencies can occur in sandy or peaty soils of a high pH, and can be overcome by using micronutrient sprays (manganese is not very mobile in the plant).
Melons - Chlorosis
Symptoms
Recently mature leaves show interveinal chlorotic mottling. On closer examination one may detect pale, watery patches with a fine brown border, especially towards the leaf margins. With severe manganese deficiency, brown necroticspots may be shown on the leaf surface. Numerous purplish-brown spots may appear on the leaf stalk or stem.
Reasons
Manganese deficiency.
While rarely seen, transient deficiencies can occur in sandy or peaty soils of a high pH, and can be overcome by using micronutrient sprays (manganese is not very mobile in the plant).
Manganese deficiency made worse by
Organic soils
Sandy soils
High pH
Cold wet periods
Fluffy soils
Manganese is important for
Chlorophyll formation and oxide-reduction in cells
