Incidence of purple root disease was observed in a five-year-old rubber plantation at Hahara, Assam, India.The fungus, Helicobasidium compactum, upon infection, forms distinct spongy fruiting bodies encircling the collar region of the rubber plant.The efficacy of fungicides viz 0.5 per cent tridemorph, 0.13 per cent propiconazole and 0.03 per cent hexaconazole was evaluated. Development of fruiting bodies of the pathogen on trees was completely checked, consequent to fungicide application. All the three fungicides were equally effective in containing the disease. Healthy plants recorded significantly higher girth compared to the affected plants. However, no significant variation was observed in girth among the treated plants. Influence of these chemicals on soil microflora was not observed at the end of the study after two years. Survey on host range of pathogen has identified Pueraria phaseoloides and Cleome viscosa as collateral hosts.