In the current version of this article the introduction has been expanded by providing a brief historical overview on fungicides and the modern requirements for fungicides to be admitted to the market. The taxonomy of fungi, in the light of recent scientific progress, is discussed briefly, and the main properties of fungi are described in some detail. Special attention is paid to the classification of phytopathogenic fungi and their major representatives relevant to agriculture. The physical and chemical properties of the individual fungicides are complemented with additional data (density, vapor pressure, stability in the environment, etc.). In the toxicology chapter ecological properties of the compounds have been added so that conclusions about the profiles of the fungicides can be made.