The plants which are considered undesirable or troublesome and grow in places where they are not desired are known as weeds. Some common examples of everyday weeds are thistle, garlic mustard and dandelion. Weed science is defined as the study of effects of weed upon human activities and their management in agricultural production systems, natural areas, and managed properties in residential and urban areas. It is a branch of applied ecology which seeks to modify the environment against natural evolutionary trends. Methods such as use of herbicides, wilting with high heat, powered cultivation with cultivators, cultivation with hoes and burning are often used to control the growth of weed. The topics included in this book on weed science are of utmost significance and bound to provide incredible insights to readers. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. Those in search of information to further their knowledge will be greatly assisted by this book