This book has been written with the basic information about the weed for example its common English name (EN), scientific name (Sc. N), local Malay name (LMN), family and its important on crop, forest and the environment. Identification of the weeds has been done from author personal experience, using appropriate bookd and internet ; and by the expert taxonomist. Then, together with the explanation, the colourful photographs of all weeds are presented for easy identification. The book will be useful for undergraduate and post-graduate students of agriculture, agro-based industry agro-technology, all scientist, academicians, extension workers, policy makers and others who are interested in weeds and weed management