Impact of Cypermethrin and Chlorpyrifos on Microbial Activity and Biomass in a Nigerian Soil O.O. Adebisi, D.O. Adetitun, and A.B. Olayemi (pp. 97-111) Abstract The impacts of a synthetic pyrethroid—cypermethrin—and organophosphate insecticide—chlorpyrifos—on soil bacterial, fungal, and pseudomonad populations; basal and …