Effects of selected synthetic and biological insecticides on microbial population and microbial activities of soil samples

Modern agriculture depends upon the wide variety of natural and synthetically produced chemicals such insecticides, fungicides, herbicides other pesticides This work studied effect synthetic biological insecticides on microbial population activities in soil samples. The used this study are cypermethrin, chloropyrifos, neem extracts ginger extracts. Bacteria fungi were isolated identified from TBC, TCC TFC determined. Dehydrogenase activity, respiration biomass carbon samples also examined. control recorded highest TFC, TCC, dehydrogenase carbon. Soils treated with chloropyrifos lowest total coliform count 0.10×105 ± 0.00 cfu/g, while cyperforce soils bacterial 0.58×105 0.025cfu/g. Cyperforce had CO2 respired a value 1687.50 1.500 mg/kg. 500 g/ml Neem leaf extract 9.40 0.100 KgC/m2. has shown that treatment both bio-insecticides resulted significant drop activity