The book primarily illuminates both the benefits as well as drawbacks of fungicides. Over the past few years, a lot of pesticides have been formulated to kill pests, and fungicides are one of these. They are primarily used to kill fungus, and are mostly utilized in medicine industry, agriculture fields in protection of seeds during storage and prevention of the growth of toxin producing fungi. Due to an increase in the importance of agriculture, the production of fungicides is also growing. Also, because of their harmful effects on humans, birds and fishes; the problems related to safety are also becoming a matter of growing concern. This book is a guide on both the harmful and helpful effects of fungicides. It discusses issues like fungicide resistance, mode of action, management fungal pathogens and defense techniques, side effects of fungicides interfering in the endocrine system, collective use of varied fungicides and the importance of GRAS (generally recognized as safe). This book is useful to almost everyone ranging from post graduate students to environmentalists and even factory owners.