It is a water-soluble compound that provides plants with the essential element copper in various biological processes. It plays a key role in enhancing the plant’s immune system against fungal diseases by oxidizing the nutrients needed by the fungus, affecting its biological processes, and eliminating it. Copper is essential for chlorophyll formation and has an active role in photosynthetic processes. It also plays a crucial role in nitrogen fixation within the plant and is essential for protein synthesis. It nullifies the toxicity of pesticides, enhances the plant’s immunity, and increases its ability to withstand stress conditions. Cuproni is a compound that protects plants from symptoms of copper deficiency, such as leaf paleness, curling of new leaves, followed by wilting at the leaf tips. It addresses the deficiency in pollen vitality, leading to a reduction in the number of formed flowers. A decrease in juice quantity inside citrus fruits may occur, along with the occurrence of retrogressive death phenomenon.