Prevention of decay was the primary task that needs to be considered during the preservation of green pepper.Green pepper was liable to be infected with certain food spoilage organisms and food-borne pathogens, such as Phytaphthora capsici, Botrytis cinerea, mild mottle virus,and Salmonella (Ikegashira et al. 2004; Liao and Cooke 2001). chlorine dioxide was a strong oxidizing agent that was effective in killing endospores, virus, algae, fungi, and some common bacillus (Beuchat 1998).chlorine dioxide could significantly reduce postharvest pathogen inoculum during handling of the fruits (Robert and Reymond 1994). In this study, it was found that the chlorine dioxide, gas treatment significantly decreased the extent of rot in green bell peppers and thereby extended their shelf life.