This book was incorporated with general information about weeds with need based data on losses caused by weeds in agriculture and allied fields which include livestock, horticulture crops etc. and also national level loss in terms of reduction in food grain production in Indian economy. As management of weeds being a core area in crop production, it was dealt in detail on weed biology, weed ecology and also weed survey including sampling techniques. This was followed by various weed control methods specific to crops belonging to agriculture and horticulture. Of the weed management practices, integrated weed management was also discussed as well highlighting important crops grown in India as to follow the same by the farmers and extension workers for recommendation to the needy people. This book also comprises of herbicide history and its classification and characteristics with suitable examples. In addition, mode of action of herbicides, herbicide mixture, combinations, rotations, and their interaction were also given as separate chapter. In the recent decade, development of herbicide resistant crops are getting momentum world over, considering its potentiality, information on the same was also given in detail with suitable findings. Weed shift and its management and economic analysis of weed management were another chapters included in this book.