Effect of Oxygen on Carbon Monoxide Suppression of Postharvest Pathogens of Fruits

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Abstract
Botrytis cinerea, Monilinia fructicola and Penicillium expansum grew well in an atmosphere containing only 4% O2. Large reductions in growth occurred only when O2 dropped below 2%, a level that may result in fermentative respiration and injury to most fruits. Carbon monoxide (9-11%) strikingly suppressed fungal growth only if the atmosphere contained < about 5 or 6% O2. Carbon monoxide may have utility as a fungistatic component of low O2 modified atmospheres in transport or storage of fruits.

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