Papaya (Carica papaya L.) is a less firmer fruit with high nutritional value and susceptible to many diseases especiallyanthracnose, causing higher postharvest losses. The present study was carried out to investigate the effect of postharvest application of silicon on anthracnose disease development, physicochemical parameters and the shelf life of papaya fruit. Postharvest losses of papaya in Sri Lanka are reported to be about 45% (Sarananda et al., 2004). Mechanical damage and postharvest diseases are the major causes for postharvest lossess in papaya fruits. Application of postharvest dip treatment of silicon at 5000 mg/L and 7500 mg/L significantly reduced (50-60%) the anthracnose development of papaya and increased the shelf life of the fruits by 4-5 days.