الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The results obtained could be summarized as follows: 1 Investigation on distribution and severity of ear rots of maize, showed that, Belcas district exhibited the highest percentage of total infection 19.4 and 32.4% green rot was 14.4% and 17.5, black rot was 0% and 1.8% in the two seasons respectively. On the other hand MeetGhamr district showed the lowest percentages of total infection 8% and 6.6%, disease severity were 3.5 and 5.7%, rose rot was 8% and 5.9% and green rot 3% and 1.5% in 2002 and 2003 seasons, respectively. 2 Pathogenicity test showed that, Fusarium moniliforme, Aspergillus flavus and Aspergillus niger were highly pathogenic fungi to maize seeds. Fusarium moniliforme caused 60% mortality. 3 Under field condition the suitable sowing date for maize cultivars, was 1st June which caused reduction in the percentage of naturally infection. 4 Under filed condition, maize hybrids were evaluated against ear rot diseases as well as total infection, disease severity, rose rot, green rot, black rot, under storage condition moisture content %, germination %, weight of 100 grains, frequency fungi associated % were determined. The data showed that SC 10 proved to be the most resistant one followed by SC 129 and TWC 326, while SC 2010 was highly susceptible to the infection by ear rot disease. 5 Increasing nitrogen doses under field condition, decreased the ear rot diseases, decreased the % of frequency associated fungi and % moisture content while increased the weight of 100 corn grains. 6 Under storage condition, the better methods for storage maize, was the storage under natural condition. 7 Increasing the storage period lead to increasing the total fungi associated with corn grains under storage condition also the moisture content was increased till the 3rd months then decreased after 6months from storage increase the storage period lead to decrease the percentage of germination, weight of 100 corn grains but increase the % of frequency associated fungi. 8 Under storage condition, ash of rice decreased the percentage of moisture content % of associated fungi and reduced the loss in viability while increased the percentage of germination and weight of 100 corn grains. 9 Calcium super phosphate decreases the percentage of moisture content, % of associated fungi and reduced the loss in viability while increased the percentage of germination and weight of 100 corn <U+2013> grains. 10 Under storage condition, cumin seeds and chamomile, were the most effective against associated fungi. Chamomile gave the highest weight of 100 <U+2013> corn grains. Anise seeds gave the lowest effect. Chamomile reduced the % of moisture content. 11 Concerning the effect of spices, black pepper were the most effective against fungi associated, while clove was the lowest one. Cinnamon increased the percentage of seed germination followed by black peppers. Black peppers gave the highest weight of 100 <U+2013> corn grains and reduce percentage of moisture content. 12 Under storage condition, Sodium benzoate gave the highest reduction in associated fungi with corn grains. 13 Maize grains were treated with three bioagent named clean root seed guard and pseudomonas. Clean root was the best bioagent in controlling associated fungi and increase both percentage of germination and weight of 100corn grains.