Industrial fungicides and mildewcides are both types of chemicals used to control or eliminate fungal growth in industrial settings.

Fungicides are specifically designed to control and prevent the growth of fungi, which can cause a wide range of problems in industrial settings. They can be applied to surfaces, used in processing, or incorporated into materials to prevent fungal growth or eliminate existing fungal colonies. 

Mildewcides, on the other hand, are designed to control and prevent the growth of mildew, which is a specific type of fungus that grows on damp or moist surfaces. They are often used in industries such as construction, where damp environments can lead to the growth of mildew on building materials.