Withania somnifera (WS) is popularly known as Ashwagandha or Winter Cherry (Andallu and Radhika, 2000). It is a green shrub (family Solanaceae) (Dafni and Yaniv, 1994) found throughout the drier parts of India, Baluchistan, Pakistan, Afghanistan, Sri Lanka, Congo, South Africa, Egypt, Morocco and Jordan. In India, it is widely grown in the provinces of Madhya Pradesh, Uttar Pradesh, plains of Punjab and northwestern parts of India like Gujarat and Rajasthan (Bhatia et al., 1987). The plant is popularly known in India by different vernacular names like Punir (Hindi), Ashvaganda (Bengal, Bombay), Aksan (Punjab), Amukkira (Tamil), Tilli (Marathi)