Fungi are ubiquitous and cosmopolitan in distribution. Fungi ae non-chlorophyllus organisms that occur in diversified habitats as saprophytes and parasites. Fungi are the second species-rich organism group after insects. It is more challenging to complete the fungal inventory as compared to other organisms such as plants. Fungi play an important role in decomposition, industry, agriculture, medicine, biotechnology and other related aspects of human welfae. The fungal flora is rich and diverse. Today around 140,000 fungal species are reported from the World. Contents: 1. Mycological characterization of agriculturally important fungi, 2. Mycological techniques and other Requirements, 2.1. General methods to study fungi, 2.2. Methods of obtaining pure fungal cultures, 2.3. Preservation and maintenance of fungal cultures, 2.4. Glossary of mycological terms, Index