The potential of silicone membranes to provide modified atmospheres for control of storage rot of carrot caused by Sclerotinia sclerotiorum (Lib.) de Bary and maintain carrot quality was assessed. Carrots were stored in five different atmospheres: high relative humidity ( HRA), unadjusted cold room atmosphere ( RA), and three atmospheres with modified CO 2 and O 2 concentrations (referred to as A, B and C). Containers fitted with silicone membranes of varying surface areas were used to maintain these atmospheres. Carrots in one-half of the containers were inoculated with S. sclerotiorum. The experiment was carried out in a cold room maintained at 1°C and was terminated after 6 months. The mean CO 2/O 2 percentages for modified atmospheres were 1.17/14.19, 1.52/12.11, 3.03/4.57, 3.81/3.73, 4.26/4.47 and 6.09/3.03% for treatments A1, B1, C1 (carrots without inoculum), A2, B2 and C2 (carrots with inoculum), respectively. All modified CO 2 and O 2 treatments provided better control of Sclerotina rot than did HRA and RA. Carrots of treatments HRA1, A1, B1 and C1 (carrots without inoculum) were kept for evaluation by a taste panel and quality assessment. Taste panel evaluation indicated that carrots from treatment C1 were superior to store-bought carrots and carrots from other treatments. Quality assessment indicated that work (defined as load versus blade displacement when carrots were cut with an Instron apparatus) was significantly greater for HRA1 as compared to the other treatments and that modulus (defined as the slope of the curve of force versus the distance travelled during the cut) was significantly higher for C1 than HRA1 and RA1.