Magnesium Deficiency - Apple

Symptom description

Leaves develop inteveinal necrosis or necrotic blotches from midrib area on older leaves first

Made worst by

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

Important for

New growth maintained green and vigorous. Fruit number and retention increased. Fruit size may be increased. Yields are greater.

Cause description

Magnesium deficiency Potassium deficiency perhaps produces similar symptoms, but starts at leaf margins.