Tobacco is one of the most important cash crops of the world as well as Pakistan. It contributes substantially to federal exchequer. The industry, directly or indirectly, provides jobs to one million people, whereas 70,000 families earn their livelihood through cultivation of the crop. Tobacco at present is grown over nearly 2% of the total area under cultivation, making Pakistan the 5th largest tobacco producing country. Its share in GDP is about 4%. Tobacco grower s faces many constrain. One of them is weed problem. Weeds adversely affect the yield and quality of tobacco. On the basis of...