Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/76266
Type: Artigo de periódico
Title: Warehouse control of Aspergillus flavus link and A-parasiticus speare on peanuts (Arachis hypogaea) by phosphine fumigation and its effect on aflatoxin production
Author: DeCastro, MFPPM
Pacheco, IA
Soares, LMV
Furlani, RPZ
DePaula, DC
Bolonhezi, S
Abstract: Six stacks of 36 bags containing ca. 50 kg of unshelled peanuts with moisture contents in the range of 18.0 to 21.0% (wet basis) (average 19.3%) were formed in a commercial warehouse located in a peanut-producing area in Sao Paulo, Brazil. Three stacks were fumigated with phosphine for 7 days. An initial dose of 3.0 g of aluminum phosphide per m(3) was applied. A second and a third application of the same dose were carried out 24 and 144 h later. Before fumigation, infection by Aspergillus flavus and/or A. parasiticus was either not detected in the peanut mass or was very low (1 to 13%), but contamination with aflatoxins (up to 191 mu g/kg) was found in all stacks. After the fumigation treatments, a striking increase in infection was observed in the nonfumigated stacks (73 to 100% infected kernels) while in the fumigated stacks, A. flavus and/or A. parasiticus were either not detected or were isolated in insignificant amounts, indicating that phosphine was able to control fungal development in spite of the high moisture content of the kernels. After the fumigation period, the contamination levels of aflatoxins in the treated stacks remained unchanged, while the untreated stacks showed a staggering increase (up to 10,000 mu g/kg of peanuts). After a month, however, no difference was observed in aflatoxin contamination and infection by A. flavus and A. parasiticus between the untreated and the treated stacks.
Subject: peanut storage
phosphine
aflatoxins
Aspergillus flavus
Aspergillus parasiticus
Editor: Int Assoc Milk Food Environmental Sanitarians, Inc
Rights: fechado
Date Issue: 1996
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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