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 |
Laboratory experiments were carried out to study the effect of milling methods on the infestation of Sitophilus oryzae on stored rice grains during 2016-17. The results of the present investigation reveals that rubber milled rice were more preferred by the weevils than the iron milled rice with significant differences in weight loss existing among the various rice categories and the highest weight loss per cent was registered from SBA rice category (31.26±0.60 and 33.07±0.62) and the lowest from SMNA rice category (24.47±0.55 and 25.98±0.56) in 2016 and 2017 respectively. The highest damaged grain percentage was also registered from SBA rice category with 42.58±0.48% and 41.22±0.42% in 2016 and 2017 respectively. The two milling method also had notable impact on the adult population of S. oryzae produced from the stored grain at 90 DAS. It was observed that the adult population from rubber milled rice was significantly higher (330.17±5.31 and 340.50±5.44) than the population recorded from the iron milled rice (264.18±5.31 and 274.74±5.44) in both the experimental years of studies i.e., 2016 and 2017. The carbohydrates and protein content so obtained from the present studies were also noted to be one of the main factors to contribute to the preference of the rice weevils in which rubber milled rice (having 55.55±0.67% and 11.05±0.15% carbohydrate and protein respectively) had greater quantity of these as compared to the iron milled rice (49.74±0.67% and 9.09±0.15% carbohydrate and protein respectively).
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