Pathogenic effects of root rot fungi on seed germination of soybean

An investigation was carried out in laboratory as well as in cage house to evaluate the incidence of root rot causing fungi collected from different seed samples and results revealed that the highest incidence of mycoflora was observed in sample SB-1 collected from Baran, while it was lowest in sample SB-5 collected from ARS, Ummedganj (Kota). Incidence of root rot causing fungi (Macrophomina phaseolina and Fusarium pallidoroseum) was also highest in sample SB-1, while it was lowest again in sample SB-5. Maximum number of seedlings of sample SB-1 showed symptoms of disease. Amongst two isolated root rot causing fungi, Macrophomina phaseolina was found highly pathogenic in causing pre-and post emergence mortality with maximum seedlings showing symptoms and in reducing seed germination, seedling vigour.