The films used in this study showed a significant suppression of respiratory activity compared to that of unpacked chillies. This effect could be attributed to the barrier properties of the films towards respiratory gases and water vapour, causing generation of modified atmosphere within the packets. Atmospheres low in O2 (1–5%) and high in CO2 (5–10%) have been used to extend the shelf-life of fresh produce, as O2 is involved in the conversion of 1-amino-cycloprane-1-carboxylic acid to ethylene and therefore low O2 levels restrict ethylene formation . The anti-fog (RD45) film showed delayed senescence with low respiration rates due to the presence of optimum modified atmosphere inside the package, as the oxygen level in the package atmosphere is lower than the regular atmosphere. Control and microporous packed chillies showed the highest respiration rates compared to the chillies packed in other films. Similar results were observed in the case of capsicum stored at 10 8C when determined by using a respirometer.