Bio-Activity of Arum cyreniacum in Control of Xanthomonas Campestris pv.vesicatoria which Causes Tomato Spot Disease

Abstract

Al-Jabal Al-Akhdar is considered one of the most important Libyan regions in terms of its diversity of native medicinal plants, which it does not obtain a received of full studies Bio-activities. This study was conducted in the laboratories of the Faculty of Education/ Department of Biology to test activity of the aqueous and ethanol extracts of leaves and tubers of Arum cyreniacum at a concentration of (100, 200 and 400) mg/ml in        a control of Xanthomonas campestris pv.vesicatoria which causes tomato spot disease, by a sensitivity test in form of Disk diffusion method. then compared with Gentamicin and Neomycin. The results showed that extracts of leaves of Arum cyreniacum possessed anti- activities in inhibiting X.campestris pv.vesicatoria and an ethanolic extract of leaves at a concentration of 400 mg/ml showed an inhibitory activity superior exceeded all a concentrations used for extracts, and gentamycin with a diameter of (8.5) mm, while recorded Neomycin has best inhibitory capacity with a diameter (16.1) mm. The study concluded the extract of leaves of Arum cyreniacum can be relied on to control of X.campestris pv.vesicatoria which cause tomato spots disease.