الفهرس 
Title : Biodegradation of ?-cyhalothrin by microorganisms isolated from polluted agricultural soil
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Abstract
λ-cyhalothrin is a widely used synthetic pyrethroid and its persistence in
plant, soil and water exerts a detrimental effect on the human as well as
environment. Under greenhouse conditions, limited work has been done examining
the microbial degradation of λ-cyhalothrin together with plant growth promotion.
In this study, 43 bacterial strains were isolated from heavily polluted soil
with λ-cyhalothrin by the enrichment technique. The plant growth promotion
characteristics of all isolates were evaluated.
The results revealed that five isolates were potential in λ-cyhalothrin
biodegradation at high concentration (1200 mg/L) within only 24 hours together
with their high plant growth promotion abilities.
The morphological, biochemical and 16S rRNA gene sequence analyses
identified the isolates as Bacillus subtilis strains. The GC/MS analysis revealed
that the selected isolates reached high levels of degradation after only two days, the
degradation percentage was ranged from 95.72-99.52% after 48 hours of
incubation