Antifungal activity of Clerodendrum viscosum against Curvularia lunata in rice seeds.
The efficacy of plant extracts of Clerodendrum viscosum leaves against the rice seedborne pathogen, Curvularia lunata [Cochliobolus lunatus] was tested in vitro and in vivo. The leaf extract of C. viscosum completely checked the radial growth of C. lunatus; a gradual decrease in growth was observed in C. lunatus grown in increasing concentrations of the leaf extract. Mycelial dry weight of the test pathogen was also reduced after treatment with leaf extract. Significantly greater seed germination rates and root and shoot lengths were recorded following treatment of rice seeds with the leaf extract. Infection percentages were also significantly reduced following seed treatment in comparison with the untreated control.