To study the efficacy of nitrogen and carbon fumigations and economical aspects under practical conditions, two empties supply stores at different temperatures 20C and 23C (65% RH) for fumigations with pure nitrogen and pure carbon dioxide, respectively. In a first purge, the oxygen contents in each bin were reduced to below 2%. Prior to fumigation, all stages of the Indian meal moth Plodia interpunctella and Mediterranean flout moth Ephestia kuehniella had been placed in 5 different altitudes in each store. Testing exposure times of 8 and 10 days (CO2) or after 12 days (N2), respectively. The calculated costs of these fumigations suggest that, in sufficiently gastight grain storages, modified atmospheres could complete economically with hydrogen phosphide fumigations.
Efficaly of carbon dioxide or nitrogen to control the indian meal moth Plodia Interpunctella Hubner and mediterranean flour moth Ephestia Kuehniella Zeller (Lepidoptera, Pyralidae) in stores