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Trials in India indicate that copper reduces acidity and increase the TSS/Acid ratio in mandarins.
Copper also has the tendency to improve the ascorbic acid content of the fruit.
Copper in citrus affects photosynthesis, plant protein production, pollen viability and therefore fruit set, respiration and water use efficiency. Over-use of copper based fungicide sprays can lead to toxicity. Tissue analysis is recommended to check for deficiencies or toxicities.
Copper at citrus growth stages | |
Fruit Enlargement and Maturation | Prevent fruit corking |