Effect of CO2 modified atmosphere packaging on aflatoxin production in maize infested with Sitophilus zeamais |
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| Affiliation: | 1. School of Biological Sciences, The University of Queensland, Brisbane, Queensland, 4072, Australia;2. Plant Biosecurity Cooperative Research Centre, LPO Box 5012, Bruce, ACT, 2617, Australia;3. Department of Agriculture and Fisheries, Queensland, Ecosciences Precinct, GPO Box 267, Brisbane, Queensland, 4001, Australia;4. Department of Primary Industries and Regional Development, 3 Baron-Hay Court, South Perth, WA, 6151, Australia;5. New South Wales Department of Primary Industries, Private Mail Bag, Wagga Wagga, NSW, 2650, Australia;1. USDA, Agricultural Research Service, Center for Grain and Animal Health Research, 1515 College Avenue, Manhattan, KS 66502, USA |
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| Abstract: | The weevil Sitophilus zeamais (Motschulsky), the maize weevil, is a pest of stored maize that can cause feeding damage and lead to the proliferation of toxigenic fungi. The application of modified atmospheres with a high concentration of CO2 is an alternative method for the control of S. zeamais and the inhibition of fungal growth. The objectives of the study were to determine the effect of S. zeamais infestation, grain damage and grain moisture content on aflatoxin production by Aspergillus flavus on maize, and the impact of high CO2 modified atmosphere packaging on pest infestation and aflatoxin production. Mycotoxin production was only recorded when maize was infested with S. zeamais and had A. flavus inoculum. However, production of mycotoxins was not recorded when the maize was mechanically damaged and stored at 18% moisture content, indicating that the biological activity of the insect was determinant in the production of mycotoxins. The high CO2 modified atmosphere packaging tested (90% CO2, 5% O2 and 5% N2) prevented mycotoxin production. |
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| Keywords: | Mycotoxins Maize weevil Stored product pests Control |
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