Fungicides are used to:

Fungicides are specifically designed to kill or inhibit the growth of fungi and fungal spores. They are widely used in agriculture, gardening, and various industries to protect crops, plants, and stored goods from fungal infections, which can cause significant damage. By targeting the fungal pathogens directly, fungicides effectively help in maintaining plant health and yield, making them an essential tool in pest management.

The other options mention insecticides, herbicides, and rodenticides, which are designed to control insects, plants, and rodents respectively. However, these substances do not have any direct effect on fungi, emphasizing that fungicides are uniquely tailored to combat fungal threats. This distinction is important for understanding how different chemical agents are employed in pest and disease management in agricultural practices.