Cu solution is widely used in agriculture as a fungicide to protect crops from fungal diseases. It is applied to plants to prevent infections such as mildew and blight, ensuring healthier yields. In the electronics industry, it serves as a key component in the production of printed circuit boards, where it is used in electroplating processes to create conductive pathways. Additionally, Cu solution plays a role in water treatment, where it helps control algae growth in reservoirs and swimming pools. It is also utilized in wood preservation to protect against insect damage and decay. In analytical chemistry, it is employed as a reagent for various tests and experiments.