Green synthesis of nanomaterials is the most recent trend in nanotechology because it is synthesized the highly valuable compounds (nanomaterials) from wastes to reduce the highly negative impact of these wastes in environment. The aim of this study was to isolate and purify the most common mycotoxin, aflatoxin producing fungi from Maize and soybean grains which considered as the great economical importance as both animal and human feed. In addition to green synthesized of a-Al2O3 from cans and to detect its antifungal effect on the isolate’s growth at different concentrations. Thereafter, determining the fungicidal concentration of the tested nanoparticles on the isolated fungal strains. The structural, morphological, optical and antifungal activity of the prepared a-Al2O3. are characterized using X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), Field Emission Scanning Electron Microscope (FESEM), Attenuated total Reflection-Fourier Transform Infrared (ATR-FTIR) and Ultraviolet-Visible (UV-Vis) spectrophotometer. Results shows that, the most common fungal strains presented were belonging to Aspergillus flavus, Fusarium oxysporum and Alternaria sp.. Formation of Al2O3 is confirmed using XRD, FESEM and ATR –FTIR. The average particle size of a-Al2O3 is 4-10 nm. Optical band gap of a-Al2O3 are calculated using Tauc relation. Through investigating the fungicide concentration, Data showed that the maximum antifungal activity of aluminum nanoparticles a-Al2O3 was detected for A. flavus, Fusarium sp.and Alternaria sp. in concentration 1, 6 and 50 mg/100ml respectively.

The present work was conducted to investigate the effect of fertilizers {mineral fertilizers (NPK) and organic fertilizer (FYM) and some herbicides (Pendimethalin at the rate of 1.7 l/fed, Prometryn at the rate of 1.0 l/ fed, Metolachlor at the rate of 1.0 l/ fed, Metribuzin at the rate of 300 g/ fed and untreated) on weeds, bacterial nodulation and soil microorganisms associated soybean crop during 2012 and 2013 summer seasons.The results showed that FYM fertilizer significantly increased the dry weight of grassy and broadleaved weeds (g/ m 2 ) after 30 days from sowing. Also, it increased the number and dry weight of nodules/plant, the number of soil microorganisms, pod number /plant, pod weight /plant (g), seeds weight / plant (g), seed yield (ton/ fed.) and NPK seed contents % compared to no fertilizer. This was true in both seasons. All the studied herbicides significantly decreased the dry weight of grassy, broad-leaved weeds and decreased number and dry weight of nodules / plant, number of soil microorganisms and increased pods number /plant, pods weight /plant (g), seeds weight /plant (g), seed yield (ton/fed.) and NPK seed contents % compared to untreated treatment.It can be concluded from this study that application of Pendimethalin at the rate of 1.7 l/ fed and Metribuzin at the rate of 300 g/ fed. with FYM fertilizer were the best for weed control and gave the highest soybean yield.

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