An experiment was conducted in the laboratory of the Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Bangladesh from July to December, 2008 to know the impact of 4 selected insecticides (i.e.,Diazinon 60 EC,...
moreAn experiment was conducted in the laboratory of the Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Bangladesh from July to December, 2008 to know the impact of 4 selected insecticides (i.e.,Diazinon 60 EC, Marshal 20 EC, Dursban 20 EC and Admire 200 SL) on soil microorganisms. The impact was expressed as amount of CO2 evolution/gram soil and dehydrogenase activity (TPF formation). CO2
evolution in soilsindicates a great activity of soil microorganisms and maximum CO2
evolution was found from Marshal 20 EC (74.8, 281.2 and 142.4 μg/g soil) at 2, 8 and 24 days of incubation while Admire 200 SL (126.5 and222.4 μg/g soil) at 4 and16 days of incubation. Diazinon 60 EC (0.073, 0.075, 0.079, 0.072 and 0.067 µmole/ml at 2, 4, 8, 16 and 24 days ofincubation respectively) had maximum TPF formation.
