The phytochemical screening of Allium sativum was investigated showing large quantities of phenolics, glycosides and flavonoids. Six pathogenic microorganisms, namely; Pseudomonas aeruginosa, Klebsiella pneumonia, Escherichia coli, Staphylococcus aureus, Aspergilleus niger and Rhizopus arrhizus were used for antimicrobial test. At concentration of 10% Allium sativum methanolic extract, microbial growth rates were inhibited except Rhizopus arrhizus. Nevertheless, Escherichia coli demonstrated the highest level of inhibition at 10% concentration of the extract with 45% inhibition rate. Methanolic extract of Allium sativum has enhanced the growth of bean and maize seedlings with shoot growth rate of 34.49 ± 0.35% and 21.35 ± 0.25% taller than the control at 2% concentration respectively. The methanolic extract of Allium sativum served as growth enhancer and exhibited good antimicrobial properties.
 

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