Magnesium deficiency causes interveinal yellowing on older leaves first. Discoloration intensifies on leaf tips and leaf margin. These areas become completely yellow, veins included. Then chlorosis proceeds towards the petiole attachment point. Leaf base remains green for the longest time. At prolonged deficiency younger leaves are affected too.
Made worst by
Sandy soils. Acidic soils. Potassium rich soils. Soils receiving high potash applications. Cold wet periods.
Combats chlorosis. Prevents premature leaf fall. Gives healthier greener trees.
Magnesium deficiency on leaves of lemon