Symptoms
Symptoms of zinc deficiency appear on young leaves first. They show yellow patches in the interveinal areas (mottle leaf).
Along the veins, an irregular green border remains.
The youngest leaves look small and trim (little leaf) and are often upright.
Reasons
Zinc deficiency on leaves of orange
Manganese deficiency causes similar symptoms.
Citrus - Chlorosis
Symptoms
Symptoms of zinc deficiency appear on young leaves first. They show yellow patches in the interveinal areas (mottle leaf).
New leaves are significantly stunted and often occur in rosettes because the twig internodes are shortened.
Twigs die back.
Reasons
Zinc deficiency on branches of orange
Zinc deficiency is a widespread nutritional disorder of citrus.
Zinc deficiency on orange made worse by
Organic soils
High pH soils
Soils rich in phosphorus
Soils receiving high phosphorus application
Cold wet conditions
Zinc is important for
Combats chlorosis
Prevents premature leaf fall
Gives healthier greener trees
Improves resistance to cold weather and late frosts
Improves bud development, flowering and fruit set
Yara recommended fertilizers for Zinc
YaraVita ZINTRAC 700
Citrus: 0.625 to 1.0 liter/hectare at Pre Flowering and repeat at post flowering. water rate 500-750 liter/hectare