Contents: 1. Introduction. 2. Ecology of weeds. 3. Reproduction and dissemination of weeds. 4. Characteristics and habits of growth. 5. Principles of weed control. 6. Herbicides used in weed control. 7. Herbicides in plant and soil. 8. Biological weed control. 9. Aquatic weeds and their control. 10. Weed control in field crops. 11. Application and action of herbicides. 12. Specific weed problem. 13. Weedicide formulations. 14. Spraying equipments. 15. Description of dicot weed. 16. Description of monocot weeds. Appendices: 1. Glossary. 2. List of weeds. 3. Important crops and weeds associated with them.