What is the main function of an algicide?

An algicide primarily functions to kill or inhibit algae growth in water bodies, such as ponds, swimming pools, or other aquatic environments. Algae can proliferate rapidly under favorable conditions, leading to issues like oxygen depletion, unpleasant odors, and water quality degradation. By effectively using an algicide, these problems can be controlled, ensuring the water remains clean and safe for both aquatic life and human activities.

While there are other chemicals that target different organisms, such as herbicides for weeds and insecticides for pests, they do not serve the same purpose as an algicide. Furthermore, promoting plant growth is the role of fertilizers or similar products and does not relate to algae control. Therefore, the correct choice focuses specifically on the action of an algicide in relation to algae management.