الفهرس 
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Abstract
This study aimed to: Two laboratory experiments were 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 purpose of the first experiment was to appraise the effect of phosphine (as a chemical insecticide) and oil neem (as natural plant oil) rates on storage efficacy and technological characters of paddy rice Sakha 101 cultivar during different storage periods (2, 4 and 6 months from beginning of storage. The aim of the second experiment 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). Storage periods of paddy rice grains (2, 4 and 6 months) had a significant effect on storage efficacy characters (number of insects, insect infestation percentage and grains weight loss percentage) and technological characters (hulling, milling, head rice ”Grading”, amylose, grain shape percentages, grain length after cooking and gelatinization temperature ”GT”). The statistical analysis of obtained results showed that studied paddy rice grains treatment (untreated grains, treating with phosphine at the rates of 2, 4 and 6 tablets/ton and oil neem at the rates of 3, 6 and 9%) had a significant effect on storage efficacy characters (number of insects, insect infestation percentage and grains weight loss percentage) and technological characters (hulling, milling, head rice ”Grading”, amylose, grain shape percentages, grain length after cooking and gelatinization temperature ”GT”) over storage periods. This study recommended that treating paddy rice grains before storage with phosphine insecticide at the rate of 4 - 6 tablets/ton or neem oil at the rate of 9 % to achieve the best possible storage efficacy and technological characters. In the cases of storage milled rice, obtained results of this study recommended that treating with phosphine insecticide at the rate of 4 - 6 tablets/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 - Dakahlia Governorate – Egypt.