Fungicide: Copper sulphate is an effective fungicide that controls a range of fungal diseases. It is used to control diseases such as potato blight, grapevine downy mildew, apple scab, and tomato blight.

Algae control: Copper sulphate is also used to control algae in irrigation ditches, ponds, and lakes. It is used in aquaculture to control algae growth in fish ponds.

Soil amendment: Copper sulphate is used as a soil amendment to correct copper deficiencies in the soil. It helps plants absorb nutrients and improves their growth.