The side effects of pesticides on the soil microflora were studied by several authors. Pesticides may affect the microbial population by controlling the survival and reproduction of individual species. On the other hand, several microorganisms were reported to degrade some pesticides (Topp et al., 2000). Population size, enzymatic activity and biodiversity of certain systematic and physiological groups of microorganisms may serve as bioindicators of changes taking place in the soil following herbicide application (Milosevia et al., 1995; Digrak and Kazanici,