The carrots are grown for their prominent root structure and characteristic flavor and colour. It is valued as food mainly because it is rich source of and â - carotene. Carrot roots are affected many post-harvest pathogens. The management of post-harvest diseases by the use of chemicals has been the primary method. However, a number of chemicals are withdrawn from the market because of development of resistance by the pathogen or for human health hazards due to residual toxicity. Post-harvest life functions cannot be stopped, but they can be slowed down by controlling the storage environment. Botanical control offers a best alternative for the control of post-harvest diseases of fruits and vegetables. Organically cultivated carrots received higher taste scores after storage. The soil particles adhering to the roots at the time of harvest may serve as a source of post-harvest pathogens. To evaluate different washing methods, a study was conducted. All the treatments were found to be superior over control. Washing of carrot roots with different concentrations of lemon grass oil was found to be very effective in reducing the disease incidence. Lemon grass oil at 0.50 per cent recorded only 34.26 per cent PDI even after 9 days after treatment with a per cent reduction of 79.95, whereas all other treatments recorded almost 100 per cent incidence on nine days after treatment.