ADVANCED STUDIES ON CERCOSPORA LEAF SPOT ON SUGAR BEET

: Sugar beet ( Beta vulgaris var. saccharifera, L.) is an economically important crop grown worldwide for sugar production. cercospora leaf spot disease, caused by Cercospora beticola , is one of the most important vegetative diseases in the northern and central Delta, which affects plant growth and sugar production in Egypt. This study was conducted as an attempt to control cercospora leaf spot disease on sugar beet using resistant cultivars, in addition to using bioagent as an alternative method to the use of fungicides. Results obtained from this work could be summarized as follows. The present study is a try to identify some Cercospora isolates that were collected from six districts in three governorates in Egypt using micro satellite DNA polymorphic analysis the results revealed that the polymorphic percentage in all tested isolates ranged between 83.33 % to zero with total polymorphic band reading 49% as for cluster analysis for RAPD the result showed that isolates were roughly grouped in two major groups according to their geographic origin. The