ENVIRONMENTAL STUDY TO THE EFFECT OF SOME TYPES OF PESTICIDE ON RHIZOBIUM SP. BACTERIAMAY HAMEED MOHAMMAD AL-DEHAMEEAbstract This study aimed to know the effect of different concentration of alphacypermethrin insecticide on Rhizobium sp. bacteria that were isolated from alfalfa root plant. Which is the one of the important bacteria in soil? The results appeared increasing in average numbers of bacteria in concentration 0.0001 and 0.0005 ml/l, in percentage growth number 107 and 109 % compared to control, while decreased in average numbers of bacteria at concentration (0.001-0.05) ml/l in average growth numbers (229, 216, 161, 129) colonies/ml. But the results didnât show significant differentiation in level of probability 0.005 with negative correlation coefficient. |