Study Aicoholic Extract Effecting of Orange Plant in the Growth of Two Types of Algae Microcystis Sp. & Chroococcus Sp

The main objective of this study is examine the effect of Bitter Orange (Citrus aurantium..L.) Peel extract against growth two species of blue-green algae (Cyanobacteria): Chroococcus sp and Microcystis sp. the growth rate of algae counted directly by Chamber. The algae farms were divided in to five groups as following : the first group(C1): Treatment control concentration 0% , the second group(C2): Treatment of alcoholic extract concentration of the orange plant 1% , the third group( C3): alcoholic extract concentration of the orange plant 3% , the fourth group (C4): Treatment of alcoholic extract concentration of the orange plant 5% , the fifth group(C5): Treatment of alcoholic extract concentration of the orange plant 8% . All groups were noted during the time periods (today,s second, the fourth day, the eighth day and the tenth day). The results showed the Bitter Orange (Citrus aurantium L.) Peel extract caused a significant inhibition(p<0.05) in the rate of growth of algae at concentration 8% for two species, and the colonies were reached in Microcystis sp (81) cell in ml compared with control , in Chroococcus sp. was least cells (43 ). Microcystis sp was more resistance for Bitter Orange Peel extract.