This book dispenses various information on hazardous chemicals called herbicides which have been widely used in India for a very long time for the management of weeds. It primarily pinpoints the particulars of use, toxicity, public health consequences and environmental effects of herbicides. The various non-chemical weed management strategies that can be adopted in lieu and the need for preserving beneficial weeds are also underscored in the study. Currently, 87 herbicides are registered in India as per the Insecticides Act of 1968 of which 20 are Highly Hazardous Pesticides (HHPs) and 9 are Deemed to be Registered Pesticides (DRPs). The overall herbicide use in India is poignant and are inherently harmful to people and environment. The very purpose of this book is to reveal the loopholes in the regulation of herbicides which has not been effective in India and gaps in national approved uses of the pesticides and recommendation given by state agriculture authorities. This requires debate and discussions. Many Highly Hazardous herbicides are being manufactured and dumped into markets. This would have undesirable impacts on soil health, farm productivity, food safety, agriculture trade, public health, as well as environmental wellbeing in the country. Registration and approval of these herbicides are masking out their toxic hazards and can lead to misapprehensions in farming communities. Herbicides are potent toxic chemicals. Their use must be prohibited for the betterment of society and the environment