The present study has been conducted to evaluate the antialgal activities of the leaves crude extracts of Dodonaea viscosa plant. The antialgal activities of ethanol (80%) and diethyl ether crude leaf extracts of D. viscosa were tested against Microcystis flos-aquae, Scenedsmus dimorphus and Mougeotia scalaris. The agar well diffusion method was used to evaluate the inhibitory actions of these extracts with three concentrations: 5,10, and 20 mg/ml. The results showed that the ethanol extracts

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... re more effective on algae than diethyl ether extracts. The alga: Mougeotia scalaris and Microcystis flos-aquae have more sensitive than Scenedsmus dimorphus to attack by the ethanolic extracts, while Mougeotia scalaris have more resistsnce to attack by the diethyl ether extracts followed by Microcystis flos-aquae, while Scenedsmus dimorphus have more sensitive to attack by diethyl ether extracts. ‫ﻧﺒﺎت‬ ‫ﻷوراق‬ ‫اﻟﺨﺎم‬ ‫اﻟﻤﺴﺘﺨﻠﺼﺎت‬ ‫ﺗﺄﺛﯿﺮ‬ Dodonaea viscosa ‫ﻰ‬ ‫ﻠ‬ ‫ﻋ‬ ‫ﺾ‬ ‫ﻌ‬ ‫ﺑ‬ ‫اﻟﻄﺤﺎﻟﺐ‬ ‫اﻟﺧﻼﺻﺔ‬ ‫ت‬ ‫درﺳ‬ ‫ﺄﺛﯾر‬ ‫ﺗ‬ ‫ات‬ ‫ﺎت‬ ‫ﻧﺑ‬ ‫ﻷوراق‬ ‫ﺎم‬ ‫اﻟﺧ‬ ‫ﺎت‬ ‫اﻟﻣﺳﺗﺧﻠﺻ‬ ‫دودوﻧﯾﺎ‬ ‫اﻟ‬ Dodonaea viscosa ‫ﻰ‬ ‫ﻋﻠ‬ ‫ب‬ ‫اﻟطﺣﺎﻟ‬. ‫ﺎدة‬ ‫اﻟﻣﺿ‬ ‫ﺔ‬ ‫اﻟﻔﻌﺎﻟﯾ‬ ‫رت‬ ‫اﺧﺗﺑ‬ ‫ﺎﻧول‬ ‫اﻻﯾﺛ‬ ‫ﺗﺧﻠص‬ ‫ﻣﺳ‬ ‫ﻲ‬ ‫ھ‬ ‫اﻷوراق‬ ‫ﺎت‬ ‫ﻣﺳﺗﺧﻠﺻ‬ ‫ن‬ ‫ﻣ‬ ‫وﻋﯾن‬ ‫ﻟﻧ‬) 80 (% ‫ب‬ ‫اﻟطﺣﺎﻟ‬ ‫ن‬ ‫ﻣ‬ ‫ل‬ ‫ﻛ‬ ‫د‬ ‫ﺿ‬ ‫ر‬ ‫اﯾﺛ‬ ‫ل‬ ‫اﺛﯾ‬ ‫داي‬ ‫اﻟ‬ ‫ﺗﺧﻠص‬ ‫وﻣﺳ‬ : Microcystis flos-aquae, Scenedsmus dimorphus ‫و‬ Mougeotia scalaris ‫ﺎر‬ ‫اﻻﻛ‬ ‫ﻼل‬ ‫ﺧ‬ ‫ﺎر‬ ‫اﻻﻧﺗﺷ‬ ‫و‬ ‫ر‬ ‫اﻟﺣﻔ‬ ‫ﺔ‬ ‫ﺑطرﯾﻘ‬ ‫اﻟﻣﺳﺗﺧﻠﺻﺎت‬ ‫ﻟﺗﻠك‬ ‫اﻟﺗﺛﺑﯾطﯾﺔ‬ ‫اﻟﻔﻌﺎﻟﯾﺔ‬ ‫ﻟﺗﺣدﯾد‬ ‫اذ‬ ‫ھﻲ‬ ‫ﺗراﻛﯾز‬ ‫ﺛﻼﺛﺔ‬ ‫اﺳﺗﺧدﻣت‬ 5 ، 10 ، 20 ‫ﻣﻠﻐم‬ / ‫ﻣل‬. ‫ا‬ ‫ظﮭرت‬ ‫داي‬ ‫اﻟ‬ ‫ﺗﺧﻠص‬ ‫ﻣﺳ‬ ‫ن‬ ‫ﻣ‬ ‫اﻟطﺣﺎﻟب‬ ‫ﻋﻠﻰ‬ ‫ﺗﺎﺛﯾرا‬ ‫اﻛﺛر‬ ‫ﻛﺎن‬ ‫ﻟﻼوراق‬ ‫اﻻﯾﺛﺎﻧول‬ ‫ﻣﺳﺗﺧﻠص‬ ‫ان‬ ‫اﻟﻧﺗﺎﺋﺞ‬ ‫ا‬ ‫اﯾﺛر‬ ‫ﺛﯾل‬. ‫ﻲ‬ ‫طﺣﻠﺑ‬ ‫ان‬ ‫و‬ ,Mougeotia scalaris Microcystis flos-aquae ‫ن‬ ‫ﻣ‬ ‫ﯾﺔ‬ ‫ﺣﺳﺎﺳ‬ ‫ر‬ ‫اﻛﺛ‬ ‫ب‬ ‫طﺣﻠ‬ Scenedsmus dimorphu ‫ب‬ ‫طﺣﻠ‬ ‫ﺎن‬ ‫ﻛ‬ ‫ﺎ‬ ‫ﺑﯾﻧﻣ‬ ‫ﺎﻧول‬ ‫اﻻﯾﺛ‬ ‫ﺗﺧﻠص‬ ‫ﻟﻣﺳ‬ Mougeotia scalaris ‫ﺗﺧﻠص‬ ‫ﻟﻣﺳ‬ ‫ﺔ‬ ‫ﻣﻘﺎوﻣ‬ ‫اﻻﻛﺛر‬ ‫رﻟ‬ ‫اﯾﺛ‬ ‫ل‬ ‫اﺛﯾ‬ ‫داي‬ ‫اﻟ‬ ‫ب‬ ‫طﺣﻠ‬ ‫ﻼه‬ ‫ﺗ‬ ‫م‬ ‫ﺛ‬ ‫ﻼوراق‬ Microcystis flos-aquae ‫ب‬ ‫طﺣﻠ‬ ‫ﺎن‬ ‫ﻛ‬ ‫ﺎ‬ ‫ﺑﯾﻧﻣ‬ Scenedsmus dimorphus ‫ﺗﺧﻠص‬ ‫ﻟﻣﺳ‬ ‫ﯾﺔ‬ ‫ﺣﺳﺎﺳ‬ ‫ر‬ ‫اﻻﻛﺛ‬ ‫اﻻوراق‬ ‫اﯾﺛر‬ ‫اﺛﯾل‬ ‫داي‬ ‫ﺑﺎﺳﺗﺧدام‬. PDF created with pdfFactory Pro trial version www.pdffactory.com