Effects of spice oil treatment of rice on moulding and mycotoxin contamination

Patkar, K. L. ; Usha, C. M. ; Shetty, H. S. ; Paster, N. ; Lacey, J. (1994) Effects of spice oil treatment of rice on moulding and mycotoxin contamination Crop Protection, 13 (7). pp. 519-524. ISSN 0261-2194

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/026121...

Related URL: http://dx.doi.org/10.1016/0261-2194(94)90104-X

Abstract

Moulding and mycotoxin production have been studied during storage of rice at 85 and 90% relative humidity (r.h.) following treatment with cinnamon and clove oils. The clove oil-treated rice was artificially inoculated with Aspergillus flavus. Aflatoxin B1 and ochratoxin A were determined by monoclonal antibody-based enzyme-linked immunosorbent assay. Both moulding and mycotoxin were inhibited by 9 μl cinnamon oil g−1 but, with smaller doses, fungi could be isolated during the early part of storage, but not subsequently. Thus, following treatment with 3 or 6 μl cinnamon oil g−1, fungi were isolated from direct plated grains after 30 days but not after 45 days. Fungi were also isolated from washings of grain up to 30 days after treatment with 3 or 6 μl g−1, although fewer than from untreated grain. Propagules could also be detected up to 15 days after treatment with 9 μl g−1. Clove oil was much less effective than cinnamon oil in preventing moulding. After treatment with 8 μl g−1, the proportion of seeds infected with fungi and numbers of propagules in washings decreased only after 60 days' storage and with 4 μ g−1 after 90 days at both relative humidities. However, aflatoxin contamination could not be detected 90, 60 and 60 days after treatment with, respectively, 2, 4 and 8 μl g−1 at 85% r.h., although ochratoxin A was present in all treatments. At 90% r.h. aflatoxin was absent only after 90 days from treatment with 4 and 8 μl g−1. No T2 toxin was detected.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Mycotoxin; Rice; Storage
ID Code:46658
Deposited On:05 Jul 2011 12:49
Last Modified:05 Jul 2011 12:49

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