الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Sugar beet (Beta vulgaris, L) is an economically important crop in the world for sugar yield. Sugar beet leaf spot disease, caused by Cercospora beticola, Sacc. (C. beticola) is the most important and destructive foliar disease in the north Delta that affects plant growth and sugar production of Egypt. This study was an attempt to control cercospora leaf spot disease of sugar beet by using a some fungicides, in addition to alternative methods such as, certain plant extracts, and induce resistance compounds. Results obtained from this study could be summarized as follows; different degrees of disease severity of cercospora leaf spot were recorded on the different sugar beet cultivars grown at the different districts. The data obtained showed significant differences between Pleno cultivar in Sakha followed by Oscar poly in Sidi-Salem and Raspoly in Kafrel gazair. While Kawmera in Atalia was the lowest disease severity. All the tested compounds have reduced significantly the linear growth of C. beticola fungus and significantly reduced disease severity in comparison with the untreated plants. difenoconazole, epoxiconazole and propiconazole fungicides at EC50 (1.1, 2.8 and 2.7 ppm, respectively) were the most effective against cercospora leaf spot disease compared to untreated control and gave the highest increase in root yield weight. The highest content of total soluble solids (T.S.S. %) was recorded with the fungicides, epoxiconazole, difenoconazole and propiconazole.