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Physical and Technological Characters of Milled Rice as Affected by Storage Periods, Treating with Phosphine and Oil Neem and Packages Types

Seadh, S.E. ; A.N. Attia ; M.A. Badawi ; & I.H.S. Shwan

A laboratory experiments was conducted under the laboratory conditions of the Experimental Station of Agronomy Department, Faculty of Agriculture, Mansoura University, Egypt, from 25th December, 2013 to 25th June, 2014. The aim of this study was to evaluate the effect of phosphine (as a chemical insecticide) and oil neem (as natural plant oil) rates and type of packages on physical and technological characters of milled rice Sakha 101 cultivar also under the environmental conditions of Dakahlia Governorate, Egypt, during different storage periods (2, 4 and 6 months from beginning of storage). The most important results can be summarized as follows: The numbers of insects and yellow grains significantly increased due to increasing storage periods. The highest amylose and grain shape percentages were resulted from storage milled rice grains up to 2 months. The highest grain length after cooking and gelatinization temperature "GT" of milled rice were resulted from storage milled rice grains up to 6 months. The best results of physical and technological characters of milled rice obtained when treating with phosphine at the rate of 6 balls/ton, followed treating with phosphine at the rate of 4 balls/ton, then treating with neem oil at the rate of 9 % and phosphine at the rate of 2 balls/ton. The best results of physical and technological characters of milled rice resulted from samples of milled rice grains stored in gunny packages, followed stored in normal packages (twisting plastic), and then stored in light cloth packages. It can be recommended that treating milled rice with phosphine insecticide at the rate of 4 - 6 balls/ton or neem oil at the rate of 9 % before storage in gunny or normal (twisting plastic) packages under the environmental conditions of the experiment in Mansoura, Egypt.