Which type of fungus affects plants or grows on inanimate objects?

Mildew is a type of fungus that typically grows on plant surfaces and in damp environments, often manifesting as a powdery growth on leaves, stems, and other plant parts. It thrives in conditions with high humidity and poor air circulation, making it a common issue in gardens and on houseplants. This type of fungus is characterized by its white or gray appearance and can contribute to the deterioration of plants by covering leaves and blocking sunlight, thus affecting photosynthesis.

In contrast, mold primarily grows on organic materials and can thrive on various surfaces such as food and building materials, but it is not specifically associated with plants. Yeast is another form of fungus, primarily used in baking and brewing, and it generally does not grow on plants or inanimate objects like mildew or mold. Blight refers to a plant disease that results in the rapid death of parts of a plant, but it does not describe the type of fungus that grows on inanimate objects.