National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The influence of gamma irradiation on microbial load of different peanut varieties has been assessed. The healthy and mature kernels of peanut variety popular in saurastra region of India viz. GG-20 and TG-37A were naturally contaminated and conditioned with three initial moisture contents (6.0%, 8.5% and 11.0%), w.b. and packed in Poly Propylene (PP) bags of 50μ thickness. These samples were irradiated with different gamma irradiation dose (0 kGy, 2.5 kGy, 5.0 kGy, 7.5 kGy and 10.0 kGy) and stored at ambient temperature for three months. Microbial load including total plate count, yeast and mold count, E.coliand salmonella were determined for irradiated and non-irradiated peanut kernels. Microbial load of both peanut varieties for tested microorganism significantly increase in non-irradiated samples whereas irradiated samples showed decrease in population for all the conditioned moisture content as storage time progressed. The research data discovered that gamma irradiation dose of 7.5 kGy is the recommended dose for complete elimination of total plate count as well as yeast and mold; whereas the 5.0 kGy is sufficient for complete killing of E. Coli.in kernels of both peanut varieties. Salmonella was not noticed in any of the samples before irradiation and during whole storage period. There was found no steady pattern in variation in D10 value, for all the tested microorganisms with respect to initial moisture in kernels of both the peanut varieties.
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