Cotton is one of the oldest cultivated crops of the world. It has been cultivated for about 8000 years both in new world and in old world. Commercial cotton comes from four cotton species: two from the new world and two from the old world.
1. Gossypium hirsutum
2. G.barbadense are the New world species and
3. G. arboretum
4. G. herbaceum are the old world species. In India, cotton is cultivated in Gujarat,
