Evaluation of the antagonistic effect of different plant species on white root disease causing fungus: Rigidoporus microporus

Antagonistic effect of some locally available plant spp. on Rigidoporus microporus (Fr.) Overeem, which causes white root disease was tested in vitro and in the field. As in vitro tests, Poisoned Food Technique (PFT) and Soil Fungicide Screening Test (SFST) were used. In the field study, the plant species were established in plots and were inoculated with Rigidoporus microporus. The innoculum potential of the soil of each plot was assessed after a certain period of time. Among the nine species used, several species showed antagonistic action over Rigidoporus microporus at in vitro tests, while Alpinia galanga L. (Galangale) showed the most significant inhibitory effect. In the field trial, the plot with Alpinia galanga showed a significantly low innoculum potential. Alpinia galanga has the potential to be developed as an antagonistic agent against the white root disease.