Warehouse control of Aspergillus flavus Link and A. parasiticus Speare on peanuts (Arachis hypogaea) by phosphine fumigation and its effect on aflatoxin production.
DE CASTRO, M.F.P.P.M., PACHECO, I.A., SOARES, L.M.V., furlani, R.P.Z., DE PAULA, D.C. and BOLONHEZI, S.
Journal of Food Protection 59 : 407-411.
1996
บทคัดย่อ
Bags containing about 50kg of unshelled peanuts with moisture contents in the range of 18-21% were stored in a commercial warehouse located in Sao Paulo, Brazil. Some stacks were fumigated with phosphine for 7 days at an initial dose of 3g/m3. A second and third application of the same dose was carried out 24 and 144hr later. Before fumigation, infection by Asopergillus flavus and/or A. parasiticus was either not detected in the peanut mass or was very low, but contamination with aflatoxins (up to 191mg/kg) was found in all stacks. After the funigation period, there was a large increase in infection levels in untreated stored bags, while in fumigated stacks A. flavus and/or A. parasiticus were either not detected or were isolated in insignificant amounts. The contamination levels of aflatoxins in the treated stacks remained unchanged, while the untreated stacks showed a large increase (up to 10mg/kg of peanuts). After one month, however, no difference was observed in aflatoxin contamination and infection by A. flavus and A. parasiticus between the untreated and treated stacks.