The fungus Macrophomina phaseolina is most frequently found associated with mungbean and blackgram as a seed-borne pathogen. This fungus infecting many crops and the disease caused by this fungus is generally called'charcoal rot' (Burman and Lodha, 1996; Dhar and Sarbhoy, 1989). In mungbean and blackgram, it reduces not only viability and vigour ofseed but also declines the quality of sprouts by producing brown toblack spots on them. Seed deterioration by fungi is quite common(Bilgrami et al., 1976). Mungbean and blackgram are substantially rich in protein and carbohydrate content(Nine, 1986) However, information on deterioration in germination andnu tritive value such as protein and carbohydrate content in mungbean and blackgram seeds was lacking. Therefore, the present investigation was undertaken to assess the exact losses in germination, carbohydrate content, and protein content due to M phaseolina infectioninmungbean and blackgram